diff --git a/.env.example.complete b/.env.example.complete
index c4c3f0b85..e8c212f39 100644
--- a/.env.example.complete
+++ b/.env.example.complete
@@ -201,6 +201,28 @@ LDAP_USER_TO_GROUPS=false
 LDAP_GROUP_ATTRIBUTE="memberOf"
 LDAP_REMOVE_FROM_GROUPS=false
 
+# SAML authentication configuration
+# Refer to https://www.bookstackapp.com/docs/admin/saml2-auth/
+SAML2_NAME=SSO
+SAML2_ENABLED=false
+SAML2_AUTO_REGISTER=true
+SAML2_EMAIL_ATTRIBUTE=email
+SAML2_DISPLAY_NAME_ATTRIBUTES=username
+SAML2_EXTERNAL_ID_ATTRIBUTE=null
+SAML2_IDP_ENTITYID=null
+SAML2_IDP_SSO=null
+SAML2_IDP_SLO=null
+SAML2_IDP_x509=null
+SAML2_ONELOGIN_OVERRIDES=null
+SAML2_DUMP_USER_DETAILS=false
+SAML2_AUTOLOAD_METADATA=false
+
+# SAML group sync configuration
+# Refer to https://www.bookstackapp.com/docs/admin/saml2-auth/
+SAML2_USER_TO_GROUPS=false
+SAML2_GROUP_ATTRIBUTE=group
+SAML2_REMOVE_FROM_GROUPS=false
+
 # Disable default third-party services such as Gravatar and Draw.IO
 # Service-specific options will override this option
 DISABLE_EXTERNAL_SERVICES=false
diff --git a/app/Auth/Access/ExternalAuthService.php b/app/Auth/Access/ExternalAuthService.php
new file mode 100644
index 000000000..4bd8f8680
--- /dev/null
+++ b/app/Auth/Access/ExternalAuthService.php
@@ -0,0 +1,83 @@
+<?php namespace BookStack\Auth\Access;
+
+use BookStack\Auth\Role;
+use BookStack\Auth\User;
+use Illuminate\Database\Eloquent\Builder;
+
+class ExternalAuthService
+{
+    /**
+     * Check a role against an array of group names to see if it matches.
+     * Checked against role 'external_auth_id' if set otherwise the name of the role.
+     */
+    protected function roleMatchesGroupNames(Role $role, array $groupNames): bool
+    {
+        if ($role->external_auth_id) {
+            return $this->externalIdMatchesGroupNames($role->external_auth_id, $groupNames);
+        }
+
+        $roleName = str_replace(' ', '-', trim(strtolower($role->display_name)));
+        return in_array($roleName, $groupNames);
+    }
+
+    /**
+     * Check if the given external auth ID string matches one of the given group names.
+     */
+    protected function externalIdMatchesGroupNames(string $externalId, array $groupNames): bool
+    {
+        $externalAuthIds = explode(',', strtolower($externalId));
+
+        foreach ($externalAuthIds as $externalAuthId) {
+            if (in_array(trim($externalAuthId), $groupNames)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Match an array of group names to BookStack system roles.
+     * Formats group names to be lower-case and hyphenated.
+     * @param array $groupNames
+     * @return \Illuminate\Support\Collection
+     */
+    protected function matchGroupsToSystemsRoles(array $groupNames)
+    {
+        foreach ($groupNames as $i => $groupName) {
+            $groupNames[$i] = str_replace(' ', '-', trim(strtolower($groupName)));
+        }
+
+        $roles = Role::query()->where(function (Builder $query) use ($groupNames) {
+            $query->whereIn('name', $groupNames);
+            foreach ($groupNames as $groupName) {
+                $query->orWhere('external_auth_id', 'LIKE', '%' . $groupName . '%');
+            }
+        })->get();
+
+        $matchedRoles = $roles->filter(function (Role $role) use ($groupNames) {
+            return $this->roleMatchesGroupNames($role, $groupNames);
+        });
+
+        return $matchedRoles->pluck('id');
+    }
+
+    /**
+     * Sync the groups to the user roles for the current user
+     * @param \BookStack\Auth\User $user
+     * @param array $userGroups
+     */
+    public function syncWithGroups(User $user, array $userGroups)
+    {
+        // Get the ids for the roles from the names
+        $groupsAsRoles = $this->matchGroupsToSystemsRoles($userGroups);
+
+        // Sync groups
+        if ($this->config['remove_from_groups']) {
+            $user->roles()->sync($groupsAsRoles);
+            $this->userRepo->attachDefaultRole($user);
+        } else {
+            $user->roles()->syncWithoutDetaching($groupsAsRoles);
+        }
+    }
+}
diff --git a/app/Auth/Access/LdapService.php b/app/Auth/Access/LdapService.php
index c7415e1f7..b0700322f 100644
--- a/app/Auth/Access/LdapService.php
+++ b/app/Auth/Access/LdapService.php
@@ -1,19 +1,17 @@
 <?php namespace BookStack\Auth\Access;
 
 use BookStack\Auth\Access;
-use BookStack\Auth\Role;
 use BookStack\Auth\User;
 use BookStack\Auth\UserRepo;
 use BookStack\Exceptions\LdapException;
 use Illuminate\Contracts\Auth\Authenticatable;
-use Illuminate\Database\Eloquent\Builder;
 
 /**
  * Class LdapService
  * Handles any app-specific LDAP tasks.
  * @package BookStack\Services
  */
-class LdapService
+class LdapService extends Access\ExternalAuthService
 {
 
     protected $ldap;
@@ -351,65 +349,6 @@ class LdapService
     public function syncGroups(User $user, string $username)
     {
         $userLdapGroups = $this->getUserGroups($username);
-
-        // Get the ids for the roles from the names
-        $ldapGroupsAsRoles = $this->matchLdapGroupsToSystemsRoles($userLdapGroups);
-
-        // Sync groups
-        if ($this->config['remove_from_groups']) {
-            $user->roles()->sync($ldapGroupsAsRoles);
-            $this->userRepo->attachDefaultRole($user);
-        } else {
-            $user->roles()->syncWithoutDetaching($ldapGroupsAsRoles);
-        }
-    }
-
-    /**
-     * Match an array of group names from LDAP to BookStack system roles.
-     * Formats LDAP group names to be lower-case and hyphenated.
-     * @param array $groupNames
-     * @return \Illuminate\Support\Collection
-     */
-    protected function matchLdapGroupsToSystemsRoles(array $groupNames)
-    {
-        foreach ($groupNames as $i => $groupName) {
-            $groupNames[$i] = str_replace(' ', '-', trim(strtolower($groupName)));
-        }
-
-        $roles = Role::query()->where(function (Builder $query) use ($groupNames) {
-            $query->whereIn('name', $groupNames);
-            foreach ($groupNames as $groupName) {
-                $query->orWhere('external_auth_id', 'LIKE', '%' . $groupName . '%');
-            }
-        })->get();
-
-        $matchedRoles = $roles->filter(function (Role $role) use ($groupNames) {
-            return $this->roleMatchesGroupNames($role, $groupNames);
-        });
-
-        return $matchedRoles->pluck('id');
-    }
-
-    /**
-     * Check a role against an array of group names to see if it matches.
-     * Checked against role 'external_auth_id' if set otherwise the name of the role.
-     * @param \BookStack\Auth\Role $role
-     * @param array $groupNames
-     * @return bool
-     */
-    protected function roleMatchesGroupNames(Role $role, array $groupNames)
-    {
-        if ($role->external_auth_id) {
-            $externalAuthIds = explode(',', strtolower($role->external_auth_id));
-            foreach ($externalAuthIds as $externalAuthId) {
-                if (in_array(trim($externalAuthId), $groupNames)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-
-        $roleName = str_replace(' ', '-', trim(strtolower($role->display_name)));
-        return in_array($roleName, $groupNames);
+        $this->syncWithGroups($user, $userLdapGroups);
     }
 }
diff --git a/app/Auth/Access/Saml2Service.php b/app/Auth/Access/Saml2Service.php
new file mode 100644
index 000000000..c1038e730
--- /dev/null
+++ b/app/Auth/Access/Saml2Service.php
@@ -0,0 +1,395 @@
+<?php namespace BookStack\Auth\Access;
+
+use BookStack\Auth\User;
+use BookStack\Auth\UserRepo;
+use BookStack\Exceptions\JsonDebugException;
+use BookStack\Exceptions\SamlException;
+use Exception;
+use Illuminate\Support\Str;
+use OneLogin\Saml2\Auth;
+use OneLogin\Saml2\Error;
+use OneLogin\Saml2\IdPMetadataParser;
+use OneLogin\Saml2\ValidationError;
+
+/**
+ * Class Saml2Service
+ * Handles any app-specific SAML tasks.
+ */
+class Saml2Service extends ExternalAuthService
+{
+    protected $config;
+    protected $userRepo;
+    protected $user;
+    protected $enabled;
+
+    /**
+     * Saml2Service constructor.
+     */
+    public function __construct(UserRepo $userRepo, User $user)
+    {
+        $this->config = config('saml2');
+        $this->userRepo = $userRepo;
+        $this->user = $user;
+        $this->enabled = config('saml2.enabled') === true;
+    }
+
+    /**
+     * Initiate a login flow.
+     * @throws Error
+     */
+    public function login(): array
+    {
+        $toolKit = $this->getToolkit();
+        $returnRoute = url('/saml2/acs');
+        return [
+            'url' => $toolKit->login($returnRoute, [], false, false, true),
+            'id' => $toolKit->getLastRequestID(),
+        ];
+    }
+
+    /**
+     * Initiate a logout flow.
+     * @throws Error
+     */
+    public function logout(): array
+    {
+        $toolKit = $this->getToolkit();
+        $returnRoute = url('/');
+
+        try {
+            $url = $toolKit->logout($returnRoute, [], null, null, true);
+            $id = $toolKit->getLastRequestID();
+        } catch (Error $error) {
+            if ($error->getCode() !== Error::SAML_SINGLE_LOGOUT_NOT_SUPPORTED) {
+                throw $error;
+            }
+
+            $this->actionLogout();
+            $url = '/';
+            $id = null;
+        }
+
+        return ['url' => $url, 'id' => $id];
+    }
+
+    /**
+     * Process the ACS response from the idp and return the
+     * matching, or new if registration active, user matched to the idp.
+     * Returns null if not authenticated.
+     * @throws Error
+     * @throws SamlException
+     * @throws ValidationError
+     * @throws JsonDebugException
+     */
+    public function processAcsResponse(?string $requestId): ?User
+    {
+        $toolkit = $this->getToolkit();
+        $toolkit->processResponse($requestId);
+        $errors = $toolkit->getErrors();
+
+        if (!empty($errors)) {
+            throw new Error(
+                'Invalid ACS Response: '.implode(', ', $errors)
+            );
+        }
+
+        if (!$toolkit->isAuthenticated()) {
+            return null;
+        }
+
+        $attrs = $toolkit->getAttributes();
+        $id = $toolkit->getNameId();
+
+        return $this->processLoginCallback($id, $attrs);
+    }
+
+    /**
+     * Process a response for the single logout service.
+     * @throws Error
+     */
+    public function processSlsResponse(?string $requestId): ?string
+    {
+        $toolkit = $this->getToolkit();
+        $redirect = $toolkit->processSLO(true, $requestId, false, null, true);
+
+        $errors = $toolkit->getErrors();
+
+        if (!empty($errors)) {
+            throw new Error(
+                'Invalid SLS Response: '.implode(', ', $errors)
+            );
+        }
+
+        $this->actionLogout();
+        return $redirect;
+    }
+
+    /**
+     * Do the required actions to log a user out.
+     */
+    protected function actionLogout()
+    {
+        auth()->logout();
+        session()->invalidate();
+    }
+
+    /**
+     * Get the metadata for this service provider.
+     * @throws Error
+     */
+    public function metadata(): string
+    {
+        $toolKit = $this->getToolkit();
+        $settings = $toolKit->getSettings();
+        $metadata = $settings->getSPMetadata();
+        $errors = $settings->validateMetadata($metadata);
+
+        if (!empty($errors)) {
+            throw new Error(
+                'Invalid SP metadata: '.implode(', ', $errors),
+                Error::METADATA_SP_INVALID
+            );
+        }
+
+        return $metadata;
+    }
+
+    /**
+     * Load the underlying Onelogin SAML2 toolkit.
+     * @throws Error
+     * @throws Exception
+     */
+    protected function getToolkit(): Auth
+    {
+        $settings = $this->config['onelogin'];
+        $overrides = $this->config['onelogin_overrides'] ?? [];
+
+        if ($overrides && is_string($overrides)) {
+            $overrides = json_decode($overrides, true);
+        }
+
+        $metaDataSettings = [];
+        if ($this->config['autoload_from_metadata']) {
+            $metaDataSettings = IdPMetadataParser::parseRemoteXML($settings['idp']['entityId']);
+        }
+
+        $spSettings = $this->loadOneloginServiceProviderDetails();
+        $settings = array_replace_recursive($settings, $spSettings, $metaDataSettings, $overrides);
+        return new Auth($settings);
+    }
+
+    /**
+     * Load dynamic service provider options required by the onelogin toolkit.
+     */
+    protected function loadOneloginServiceProviderDetails(): array
+    {
+        $spDetails = [
+            'entityId' => url('/saml2/metadata'),
+            'assertionConsumerService' => [
+                'url' => url('/saml2/acs'),
+            ],
+            'singleLogoutService' => [
+                'url' => url('/saml2/sls')
+            ],
+        ];
+
+        return [
+            'baseurl' => url('/saml2'),
+            'sp' => $spDetails
+        ];
+    }
+
+    /**
+     * Check if groups should be synced.
+     */
+    protected function shouldSyncGroups(): bool
+    {
+        return $this->enabled && $this->config['user_to_groups'] !== false;
+    }
+
+    /**
+     * Calculate the display name
+     */
+    protected function getUserDisplayName(array $samlAttributes, string $defaultValue): string
+    {
+        $displayNameAttr = $this->config['display_name_attributes'];
+
+        $displayName = [];
+        foreach ($displayNameAttr as $dnAttr) {
+            $dnComponent = $this->getSamlResponseAttribute($samlAttributes, $dnAttr, null);
+            if ($dnComponent !== null) {
+                $displayName[] = $dnComponent;
+            }
+        }
+
+        if (count($displayName) == 0) {
+            $displayName = $defaultValue;
+        } else {
+            $displayName = implode(' ', $displayName);
+        }
+
+        return $displayName;
+    }
+
+    /**
+     * Get the value to use as the external id saved in BookStack
+     * used to link the user to an existing BookStack DB user.
+     */
+    protected function getExternalId(array $samlAttributes, string $defaultValue)
+    {
+        $userNameAttr = $this->config['external_id_attribute'];
+        if ($userNameAttr === null) {
+            return $defaultValue;
+        }
+
+        return $this->getSamlResponseAttribute($samlAttributes, $userNameAttr, $defaultValue);
+    }
+
+    /**
+     * Extract the details of a user from a SAML response.
+     */
+    public function getUserDetails(string $samlID, $samlAttributes): array
+    {
+        $emailAttr = $this->config['email_attribute'];
+        $externalId = $this->getExternalId($samlAttributes, $samlID);
+
+        $defaultEmail = filter_var($samlID, FILTER_VALIDATE_EMAIL) ? $samlID : null;
+        $email = $this->getSamlResponseAttribute($samlAttributes, $emailAttr, $defaultEmail);
+
+        return [
+            'external_id' => $externalId,
+            'name' => $this->getUserDisplayName($samlAttributes, $externalId),
+            'email' => $email,
+            'saml_id' => $samlID,
+        ];
+    }
+
+    /**
+     * Get the groups a user is a part of from the SAML response.
+     */
+    public function getUserGroups(array $samlAttributes): array
+    {
+        $groupsAttr = $this->config['group_attribute'];
+        $userGroups = $samlAttributes[$groupsAttr] ?? null;
+
+        if (!is_array($userGroups)) {
+            $userGroups = [];
+        }
+
+        return $userGroups;
+    }
+
+    /**
+     *  For an array of strings, return a default for an empty array,
+     *  a string for an array with one element and the full array for
+     *  more than one element.
+     */
+    protected function simplifyValue(array $data, $defaultValue)
+    {
+        switch (count($data)) {
+            case 0:
+                $data = $defaultValue;
+                break;
+            case 1:
+                $data = $data[0];
+                break;
+        }
+        return $data;
+    }
+
+    /**
+     * Get a property from an SAML response.
+     * Handles properties potentially being an array.
+     */
+    protected function getSamlResponseAttribute(array $samlAttributes, string $propertyKey, $defaultValue)
+    {
+        if (isset($samlAttributes[$propertyKey])) {
+            return $this->simplifyValue($samlAttributes[$propertyKey], $defaultValue);
+        }
+
+        return $defaultValue;
+    }
+
+    /**
+     *  Register a user that is authenticated but not already registered.
+     */
+    protected function registerUser(array $userDetails): User
+    {
+        // Create an array of the user data to create a new user instance
+        $userData = [
+            'name' => $userDetails['name'],
+            'email' => $userDetails['email'],
+            'password' => Str::random(32),
+            'external_auth_id' => $userDetails['external_id'],
+            'email_confirmed' => true,
+        ];
+
+        $existingUser = $this->user->newQuery()->where('email', '=', $userDetails['email'])->first();
+        if ($existingUser) {
+            throw new SamlException(trans('errors.saml_email_exists', ['email' => $userDetails['email']]));
+        }
+
+        $user = $this->user->forceCreate($userData);
+        $this->userRepo->attachDefaultRole($user);
+        $this->userRepo->downloadAndAssignUserAvatar($user);
+        return $user;
+    }
+
+    /**
+     * Get the user from the database for the specified details.
+     */
+    protected function getOrRegisterUser(array $userDetails): ?User
+    {
+        $isRegisterEnabled = $this->config['auto_register'] === true;
+        $user = $this->user
+          ->where('external_auth_id', $userDetails['external_id'])
+          ->first();
+
+        if ($user === null && $isRegisterEnabled) {
+            $user = $this->registerUser($userDetails);
+        }
+
+        return $user;
+    }
+
+    /**
+     * Process the SAML response for a user. Login the user when
+     * they exist, optionally registering them automatically.
+     * @throws SamlException
+     * @throws JsonDebugException
+     */
+    public function processLoginCallback(string $samlID, array $samlAttributes): User
+    {
+        $userDetails = $this->getUserDetails($samlID, $samlAttributes);
+        $isLoggedIn = auth()->check();
+
+        if ($this->config['dump_user_details']) {
+            throw new JsonDebugException([
+                'id_from_idp' => $samlID,
+                'attrs_from_idp' => $samlAttributes,
+                'attrs_after_parsing' => $userDetails,
+            ]);
+        }
+
+        if ($userDetails['email'] === null) {
+            throw new SamlException(trans('errors.saml_no_email_address'));
+        }
+
+        if ($isLoggedIn) {
+            throw new SamlException(trans('errors.saml_already_logged_in'), '/login');
+        }
+
+        $user = $this->getOrRegisterUser($userDetails);
+        if ($user === null) {
+            throw new SamlException(trans('errors.saml_user_not_registered', ['name' => $userDetails['external_id']]), '/login');
+        }
+
+        if ($this->shouldSyncGroups()) {
+            $groups = $this->getUserGroups($samlAttributes);
+            $this->syncWithGroups($user, $groups);
+        }
+
+        auth()->login($user);
+        return $user;
+    }
+}
diff --git a/app/Auth/Role.php b/app/Auth/Role.php
index 712f5299b..3342ef5a8 100644
--- a/app/Auth/Role.php
+++ b/app/Auth/Role.php
@@ -4,6 +4,13 @@ use BookStack\Auth\Permissions\JointPermission;
 use BookStack\Auth\Permissions\RolePermission;
 use BookStack\Model;
 
+/**
+ * Class Role
+ * @property string $display_name
+ * @property string $description
+ * @property string $external_auth_id
+ * @package BookStack\Auth
+ */
 class Role extends Model
 {
 
diff --git a/app/Config/saml2.php b/app/Config/saml2.php
new file mode 100644
index 000000000..2f2ad14f1
--- /dev/null
+++ b/app/Config/saml2.php
@@ -0,0 +1,148 @@
+<?php
+
+return [
+
+    // Display name, shown to users, for SAML2 option
+    'name' => env('SAML2_NAME', 'SSO'),
+    // Toggle whether the SAML2 option is active
+    'enabled' => env('SAML2_ENABLED', false),
+    // Enable registration via SAML2 authentication
+    'auto_register' => env('SAML2_AUTO_REGISTER', true),
+
+    // Dump user details after a login request for debugging purposes
+    'dump_user_details' => env('SAML2_DUMP_USER_DETAILS', false),
+
+    // Attribute, within a SAML response, to find the user's email address
+    'email_attribute' => env('SAML2_EMAIL_ATTRIBUTE', 'email'),
+    // Attribute, within a SAML response, to find the user's display name
+    'display_name_attributes' => explode('|', env('SAML2_DISPLAY_NAME_ATTRIBUTES', 'username')),
+    // Attribute, within a SAML response, to use to connect a BookStack user to the SAML user.
+    'external_id_attribute' => env('SAML2_EXTERNAL_ID_ATTRIBUTE', null),
+
+    // Group sync options
+    // Enable syncing, upon login, of SAML2 groups to BookStack groups
+    'user_to_groups' => env('SAML2_USER_TO_GROUPS', false),
+    // Attribute, within a SAML response, to find group names on
+    'group_attribute' => env('SAML2_GROUP_ATTRIBUTE', 'group'),
+    // When syncing groups, remove any groups that no longer match. Otherwise sync only adds new groups.
+    'remove_from_groups' => env('SAML2_REMOVE_FROM_GROUPS', false),
+
+    // Autoload IDP details from the metadata endpoint
+    'autoload_from_metadata' => env('SAML2_AUTOLOAD_METADATA', false),
+
+    // Overrides, in JSON format, to the configuration passed to underlying onelogin library.
+    'onelogin_overrides' => env('SAML2_ONELOGIN_OVERRIDES', null),
+
+
+    'onelogin' => [
+        // If 'strict' is True, then the PHP Toolkit will reject unsigned
+        // or unencrypted messages if it expects them signed or encrypted
+        // Also will reject the messages if not strictly follow the SAML
+        // standard: Destination, NameId, Conditions ... are validated too.
+        'strict' => true,
+
+        // Enable debug mode (to print errors)
+        'debug' => env('APP_DEBUG', false),
+
+        // Set a BaseURL to be used instead of try to guess
+        // the BaseURL of the view that process the SAML Message.
+        // Ex. http://sp.example.com/
+        //     http://example.com/sp/
+        'baseurl' => null,
+
+        // Service Provider Data that we are deploying
+        'sp' => [
+            // Identifier of the SP entity  (must be a URI)
+            'entityId' => '',
+
+            // Specifies info about where and how the <AuthnResponse> message MUST be
+            // returned to the requester, in this case our SP.
+            'assertionConsumerService' => [
+                // URL Location where the <Response> from the IdP will be returned
+                'url' => '',
+                // SAML protocol binding to be used when returning the <Response>
+                // message.  Onelogin Toolkit supports for this endpoint the
+                // HTTP-POST binding only
+                'binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST',
+            ],
+
+            // Specifies info about where and how the <Logout Response> message MUST be
+            // returned to the requester, in this case our SP.
+            'singleLogoutService' => [
+                // URL Location where the <Response> from the IdP will be returned
+                'url' => '',
+                // SAML protocol binding to be used when returning the <Response>
+                // message.  Onelogin Toolkit supports for this endpoint the
+                // HTTP-Redirect binding only
+                'binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect',
+            ],
+
+            // Specifies constraints on the name identifier to be used to
+            // represent the requested subject.
+            // Take a look on lib/Saml2/Constants.php to see the NameIdFormat supported
+            'NameIDFormat' => 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress',
+            // Usually x509cert and privateKey of the SP are provided by files placed at
+            // the certs folder. But we can also provide them with the following parameters
+            'x509cert' => '',
+            'privateKey' => '',
+        ],
+        // Identity Provider Data that we want connect with our SP
+        'idp' => [
+            // Identifier of the IdP entity  (must be a URI)
+            'entityId' => env('SAML2_IDP_ENTITYID', null),
+            // SSO endpoint info of the IdP. (Authentication Request protocol)
+            'singleSignOnService' => [
+                // URL Target of the IdP where the SP will send the Authentication Request Message
+                'url' => env('SAML2_IDP_SSO', null),
+                // SAML protocol binding to be used when returning the <Response>
+                // message.  Onelogin Toolkit supports for this endpoint the
+                // HTTP-Redirect binding only
+                'binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect',
+            ],
+            // SLO endpoint info of the IdP.
+            'singleLogoutService' => [
+                // URL Location of the IdP where the SP will send the SLO Request
+                'url' => env('SAML2_IDP_SLO', null),
+                // URL location of the IdP where the SP will send the SLO Response (ResponseLocation)
+                // if not set, url for the SLO Request will be used
+                'responseUrl' => '',
+                // SAML protocol binding to be used when returning the <Response>
+                // message.  Onelogin Toolkit supports for this endpoint the
+                // HTTP-Redirect binding only
+                'binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect',
+            ],
+            // Public x509 certificate of the IdP
+            'x509cert' => env('SAML2_IDP_x509', null),
+            /*
+             *  Instead of use the whole x509cert you can use a fingerprint in
+             *  order to validate the SAMLResponse, but we don't recommend to use
+             *  that method on production since is exploitable by a collision
+             *  attack.
+             *  (openssl x509 -noout -fingerprint -in "idp.crt" to generate it,
+             *   or add for example the -sha256 , -sha384 or -sha512 parameter)
+             *
+             *  If a fingerprint is provided, then the certFingerprintAlgorithm is required in order to
+             *  let the toolkit know which Algorithm was used. Possible values: sha1, sha256, sha384 or sha512
+             *  'sha1' is the default value.
+             */
+            // 'certFingerprint' => '',
+            // 'certFingerprintAlgorithm' => 'sha1',
+            /* In some scenarios the IdP uses different certificates for
+             * signing/encryption, or is under key rollover phase and more
+             * than one certificate is published on IdP metadata.
+             * In order to handle that the toolkit offers that parameter.
+             * (when used, 'x509cert' and 'certFingerprint' values are
+             * ignored).
+             */
+            // 'x509certMulti' => array(
+            //      'signing' => array(
+            //          0 => '<cert1-string>',
+            //      ),
+            //      'encryption' => array(
+            //          0 => '<cert2-string>',
+            //      )
+            // ),
+        ],
+    ],
+
+];
diff --git a/app/Config/services.php b/app/Config/services.php
index 923015f6e..a3ddf4f4d 100644
--- a/app/Config/services.php
+++ b/app/Config/services.php
@@ -130,6 +130,6 @@ return [
         'group_attribute' => env('LDAP_GROUP_ATTRIBUTE', 'memberOf'),
         'remove_from_groups' => env('LDAP_REMOVE_FROM_GROUPS', false),
         'tls_insecure' => env('LDAP_TLS_INSECURE', false),
-    ]
+    ],
 
 ];
diff --git a/app/Exceptions/JsonDebugException.php b/app/Exceptions/JsonDebugException.php
new file mode 100644
index 000000000..6314533ce
--- /dev/null
+++ b/app/Exceptions/JsonDebugException.php
@@ -0,0 +1,25 @@
+<?php namespace BookStack\Exceptions;
+
+use Exception;
+
+class JsonDebugException extends Exception
+{
+
+    protected $data;
+
+    /**
+     * JsonDebugException constructor.
+     */
+    public function __construct($data)
+    {
+        $this->data = $data;
+    }
+
+    /**
+     * Covert this exception into a response.
+     */
+    public function render()
+    {
+        return response()->json($this->data);
+    }
+}
\ No newline at end of file
diff --git a/app/Exceptions/SamlException.php b/app/Exceptions/SamlException.php
new file mode 100644
index 000000000..13db23f27
--- /dev/null
+++ b/app/Exceptions/SamlException.php
@@ -0,0 +1,6 @@
+<?php namespace BookStack\Exceptions;
+
+class SamlException extends NotifyException
+{
+
+}
diff --git a/app/Http/Controllers/Auth/LoginController.php b/app/Http/Controllers/Auth/LoginController.php
index 2b51ab997..b1d22d57e 100644
--- a/app/Http/Controllers/Auth/LoginController.php
+++ b/app/Http/Controllers/Auth/LoginController.php
@@ -119,6 +119,7 @@ class LoginController extends Controller
     {
         $socialDrivers = $this->socialAuthService->getActiveDrivers();
         $authMethod = config('auth.method');
+        $samlEnabled = config('saml2.enabled') === true;
 
         if ($request->has('email')) {
             session()->flashInput([
@@ -127,7 +128,11 @@ class LoginController extends Controller
             ]);
         }
 
-        return view('auth.login', ['socialDrivers' => $socialDrivers, 'authMethod' => $authMethod]);
+        return view('auth.login', [
+          'socialDrivers' => $socialDrivers,
+          'authMethod' => $authMethod,
+          'samlEnabled' => $samlEnabled,
+        ]);
     }
 
     /**
@@ -141,4 +146,23 @@ class LoginController extends Controller
         session()->put('social-callback', 'login');
         return $this->socialAuthService->startLogIn($socialDriver);
     }
+
+    /**
+     * Log the user out of the application.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return \Illuminate\Http\Response
+     */
+    public function logout(Request $request)
+    {
+        if (config('saml2.enabled') && session()->get('last_login_type') === 'saml2') {
+            return redirect('/saml2/logout');
+        }
+
+        $this->guard()->logout();
+
+        $request->session()->invalidate();
+
+        return $this->loggedOut($request) ?: redirect('/');
+    }
 }
diff --git a/app/Http/Controllers/Auth/RegisterController.php b/app/Http/Controllers/Auth/RegisterController.php
index 304d3bed2..000833029 100644
--- a/app/Http/Controllers/Auth/RegisterController.php
+++ b/app/Http/Controllers/Auth/RegisterController.php
@@ -103,7 +103,11 @@ class RegisterController extends Controller
     {
         $this->checkRegistrationAllowed();
         $socialDrivers = $this->socialAuthService->getActiveDrivers();
-        return view('auth.register', ['socialDrivers' => $socialDrivers]);
+        $samlEnabled = (config('saml2.enabled') === true) && (config('saml2.auto_register') === true);
+        return view('auth.register', [
+            'socialDrivers' => $socialDrivers,
+            'samlEnabled' => $samlEnabled,
+        ]);
     }
 
     /**
diff --git a/app/Http/Controllers/Auth/Saml2Controller.php b/app/Http/Controllers/Auth/Saml2Controller.php
new file mode 100644
index 000000000..863894128
--- /dev/null
+++ b/app/Http/Controllers/Auth/Saml2Controller.php
@@ -0,0 +1,96 @@
+<?php
+
+namespace BookStack\Http\Controllers\Auth;
+
+use BookStack\Auth\Access\Saml2Service;
+use BookStack\Http\Controllers\Controller;
+
+class Saml2Controller extends Controller
+{
+
+    protected $samlService;
+
+    /**
+     * Saml2Controller constructor.
+     */
+    public function __construct(Saml2Service $samlService)
+    {
+        parent::__construct();
+        $this->samlService = $samlService;
+
+        // SAML2 access middleware
+        $this->middleware(function ($request, $next) {
+            if (!config('saml2.enabled')) {
+                $this->showPermissionError();
+            }
+
+            return $next($request);
+        });
+    }
+
+    /**
+     * Start the login flow via SAML2.
+     */
+    public function login()
+    {
+        $loginDetails = $this->samlService->login();
+        session()->flash('saml2_request_id', $loginDetails['id']);
+
+        return redirect($loginDetails['url']);
+    }
+
+    /**
+     * Start the logout flow via SAML2.
+     */
+    public function logout()
+    {
+        $logoutDetails = $this->samlService->logout();
+
+        if ($logoutDetails['id']) {
+            session()->flash('saml2_logout_request_id', $logoutDetails['id']);
+        }
+
+        return redirect($logoutDetails['url']);
+    }
+
+    /*
+     * Get the metadata for this SAML2 service provider.
+     */
+    public function metadata()
+    {
+        $metaData = $this->samlService->metadata();
+        return response()->make($metaData, 200, [
+            'Content-Type' => 'text/xml'
+        ]);
+    }
+
+    /**
+     * Single logout service.
+     * Handle logout requests and responses.
+     */
+    public function sls()
+    {
+        $requestId = session()->pull('saml2_logout_request_id', null);
+        $redirect = $this->samlService->processSlsResponse($requestId) ?? '/';
+        return redirect($redirect);
+    }
+
+    /**
+     * Assertion Consumer Service.
+     * Processes the SAML response from the IDP.
+     */
+    public function acs()
+    {
+        $requestId = session()->pull('saml2_request_id', null);
+
+        $user = $this->samlService->processAcsResponse($requestId);
+        if ($user === null) {
+            $this->showErrorNotification(trans('errors.saml_fail_authed', ['system' => config('saml2.name')]));
+            return redirect('/login');
+        }
+
+        session()->put('last_login_type', 'saml2');
+        return redirect()->intended();
+    }
+
+}
diff --git a/app/Http/Middleware/VerifyCsrfToken.php b/app/Http/Middleware/VerifyCsrfToken.php
index 1a29a2b1d..bdeb26554 100644
--- a/app/Http/Middleware/VerifyCsrfToken.php
+++ b/app/Http/Middleware/VerifyCsrfToken.php
@@ -19,6 +19,6 @@ class VerifyCsrfToken extends Middleware
      * @var array
      */
     protected $except = [
-        //
+        'saml2/*'
     ];
 }
diff --git a/composer.json b/composer.json
index a8b9456a1..98cfa1e2a 100644
--- a/composer.json
+++ b/composer.json
@@ -22,6 +22,7 @@
         "laravel/framework": "^6.0",
         "laravel/socialite": "^4.2",
         "league/flysystem-aws-s3-v3": "^1.0",
+        "onelogin/php-saml": "^3.3",
         "predis/predis": "^1.1",
         "socialiteproviders/discord": "^2.0",
         "socialiteproviders/gitlab": "^3.0",
diff --git a/composer.lock b/composer.lock
index 3ec106ded..346adb47c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,23 +1,23 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "c156e1738dbab2a57f9a926d9a9a5a6a",
+    "content-hash": "140c7a04a20cef6d7ed8c1fc48257e66",
     "packages": [
         {
             "name": "aws/aws-sdk-php",
-            "version": "3.112.0",
+            "version": "3.117.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/aws/aws-sdk-php.git",
-                "reference": "1e21446c6780a3b9b5e4315bd6d4347d2c3381eb"
+                "reference": "3dc81df70f1cdf2842c85915548bffb870c1e1da"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/aws/aws-sdk-php/zipball/1e21446c6780a3b9b5e4315bd6d4347d2c3381eb",
-                "reference": "1e21446c6780a3b9b5e4315bd6d4347d2c3381eb",
+                "url": "https://api.github.com/repos/aws/aws-sdk-php/zipball/3dc81df70f1cdf2842c85915548bffb870c1e1da",
+                "reference": "3dc81df70f1cdf2842c85915548bffb870c1e1da",
                 "shasum": ""
             },
             "require": {
@@ -87,7 +87,7 @@
                 "s3",
                 "sdk"
             ],
-            "time": "2019-09-12T18:09:53+00:00"
+            "time": "2019-11-15T19:21:02+00:00"
         },
         {
             "name": "barryvdh/laravel-dompdf",
@@ -147,21 +147,21 @@
         },
         {
             "name": "barryvdh/laravel-snappy",
-            "version": "v0.4.5",
+            "version": "v0.4.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/barryvdh/laravel-snappy.git",
-                "reference": "9be767fc7a082665a84945f36c70b0cbead91ce9"
+                "reference": "94d53c88fa58baa4573c5854663ebc9955f21265"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/barryvdh/laravel-snappy/zipball/9be767fc7a082665a84945f36c70b0cbead91ce9",
-                "reference": "9be767fc7a082665a84945f36c70b0cbead91ce9",
+                "url": "https://api.github.com/repos/barryvdh/laravel-snappy/zipball/94d53c88fa58baa4573c5854663ebc9955f21265",
+                "reference": "94d53c88fa58baa4573c5854663ebc9955f21265",
                 "shasum": ""
             },
             "require": {
-                "illuminate/filesystem": "5.5.x|5.6.x|5.7.x|5.8.x|6.0.*",
-                "illuminate/support": "5.5.x|5.6.x|5.7.x|5.8.x|6.0.*",
+                "illuminate/filesystem": "5.5.x|5.6.x|5.7.x|5.8.x|6.*",
+                "illuminate/support": "5.5.x|5.6.x|5.7.x|5.8.x|6.*",
                 "knplabs/knp-snappy": "^1",
                 "php": ">=7"
             },
@@ -204,7 +204,7 @@
                 "wkhtmltoimage",
                 "wkhtmltopdf"
             ],
-            "time": "2019-08-30T16:12:23+00:00"
+            "time": "2019-10-02T23:27:09+00:00"
         },
         {
             "name": "cogpowered/finediff",
@@ -259,16 +259,16 @@
         },
         {
             "name": "doctrine/cache",
-            "version": "v1.8.0",
+            "version": "1.9.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/cache.git",
-                "reference": "d768d58baee9a4862ca783840eca1b9add7a7f57"
+                "reference": "89a5c76c39c292f7798f964ab3c836c3f8192a55"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/cache/zipball/d768d58baee9a4862ca783840eca1b9add7a7f57",
-                "reference": "d768d58baee9a4862ca783840eca1b9add7a7f57",
+                "url": "https://api.github.com/repos/doctrine/cache/zipball/89a5c76c39c292f7798f964ab3c836c3f8192a55",
+                "reference": "89a5c76c39c292f7798f964ab3c836c3f8192a55",
                 "shasum": ""
             },
             "require": {
@@ -279,7 +279,7 @@
             },
             "require-dev": {
                 "alcaeus/mongo-php-adapter": "^1.1",
-                "doctrine/coding-standard": "^4.0",
+                "doctrine/coding-standard": "^6.0",
                 "mongodb/mongodb": "^1.1",
                 "phpunit/phpunit": "^7.0",
                 "predis/predis": "~1.0"
@@ -290,7 +290,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.8.x-dev"
+                    "dev-master": "1.9.x-dev"
                 }
             },
             "autoload": {
@@ -303,6 +303,10 @@
                 "MIT"
             ],
             "authors": [
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
                 {
                     "name": "Roman Borschel",
                     "email": "roman@code-factory.org"
@@ -311,10 +315,6 @@
                     "name": "Benjamin Eberlei",
                     "email": "kontakt@beberlei.de"
                 },
-                {
-                    "name": "Guilherme Blanco",
-                    "email": "guilhermeblanco@gmail.com"
-                },
                 {
                     "name": "Jonathan Wage",
                     "email": "jonwage@gmail.com"
@@ -324,41 +324,48 @@
                     "email": "schmittjoh@gmail.com"
                 }
             ],
-            "description": "Caching library offering an object-oriented API for many cache backends",
-            "homepage": "https://www.doctrine-project.org",
+            "description": "PHP Doctrine Cache library is a popular cache implementation that supports many different drivers such as redis, memcache, apc, mongodb and others.",
+            "homepage": "https://www.doctrine-project.org/projects/cache.html",
             "keywords": [
+                "abstraction",
+                "apcu",
                 "cache",
-                "caching"
+                "caching",
+                "couchdb",
+                "memcached",
+                "php",
+                "redis",
+                "riak",
+                "xcache"
             ],
-            "time": "2018-08-21T18:01:43+00:00"
+            "time": "2019-11-15T14:31:57+00:00"
         },
         {
             "name": "doctrine/dbal",
-            "version": "v2.9.2",
+            "version": "v2.10.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/dbal.git",
-                "reference": "22800bd651c1d8d2a9719e2a3dc46d5108ebfcc9"
+                "reference": "0c9a646775ef549eb0a213a4f9bd4381d9b4d934"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/dbal/zipball/22800bd651c1d8d2a9719e2a3dc46d5108ebfcc9",
-                "reference": "22800bd651c1d8d2a9719e2a3dc46d5108ebfcc9",
+                "url": "https://api.github.com/repos/doctrine/dbal/zipball/0c9a646775ef549eb0a213a4f9bd4381d9b4d934",
+                "reference": "0c9a646775ef549eb0a213a4f9bd4381d9b4d934",
                 "shasum": ""
             },
             "require": {
                 "doctrine/cache": "^1.0",
                 "doctrine/event-manager": "^1.0",
                 "ext-pdo": "*",
-                "php": "^7.1"
+                "php": "^7.2"
             },
             "require-dev": {
-                "doctrine/coding-standard": "^5.0",
-                "jetbrains/phpstorm-stubs": "^2018.1.2",
-                "phpstan/phpstan": "^0.10.1",
-                "phpunit/phpunit": "^7.4",
-                "symfony/console": "^2.0.5|^3.0|^4.0",
-                "symfony/phpunit-bridge": "^3.4.5|^4.0.5"
+                "doctrine/coding-standard": "^6.0",
+                "jetbrains/phpstorm-stubs": "^2019.1",
+                "phpstan/phpstan": "^0.11.3",
+                "phpunit/phpunit": "^8.4.1",
+                "symfony/console": "^2.0.5|^3.0|^4.0|^5.0"
             },
             "suggest": {
                 "symfony/console": "For helpful console commands such as SQL execution and import of files."
@@ -369,7 +376,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.9.x-dev",
+                    "dev-master": "2.10.x-dev",
                     "dev-develop": "3.0.x-dev"
                 }
             },
@@ -383,6 +390,10 @@
                 "MIT"
             ],
             "authors": [
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
                 {
                     "name": "Roman Borschel",
                     "email": "roman@code-factory.org"
@@ -391,10 +402,6 @@
                     "name": "Benjamin Eberlei",
                     "email": "kontakt@beberlei.de"
                 },
-                {
-                    "name": "Guilherme Blanco",
-                    "email": "guilhermeblanco@gmail.com"
-                },
                 {
                     "name": "Jonathan Wage",
                     "email": "jonwage@gmail.com"
@@ -405,27 +412,38 @@
             "keywords": [
                 "abstraction",
                 "database",
+                "db2",
                 "dbal",
+                "mariadb",
+                "mssql",
                 "mysql",
-                "persistence",
+                "oci8",
+                "oracle",
+                "pdo",
                 "pgsql",
-                "php",
-                "queryobject"
+                "postgresql",
+                "queryobject",
+                "sasql",
+                "sql",
+                "sqlanywhere",
+                "sqlite",
+                "sqlserver",
+                "sqlsrv"
             ],
-            "time": "2018-12-31T03:27:51+00:00"
+            "time": "2019-11-03T16:50:43+00:00"
         },
         {
             "name": "doctrine/event-manager",
-            "version": "v1.0.0",
+            "version": "1.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/event-manager.git",
-                "reference": "a520bc093a0170feeb6b14e9d83f3a14452e64b3"
+                "reference": "629572819973f13486371cb611386eb17851e85c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/event-manager/zipball/a520bc093a0170feeb6b14e9d83f3a14452e64b3",
-                "reference": "a520bc093a0170feeb6b14e9d83f3a14452e64b3",
+                "url": "https://api.github.com/repos/doctrine/event-manager/zipball/629572819973f13486371cb611386eb17851e85c",
+                "reference": "629572819973f13486371cb611386eb17851e85c",
                 "shasum": ""
             },
             "require": {
@@ -435,7 +453,7 @@
                 "doctrine/common": "<2.9@dev"
             },
             "require-dev": {
-                "doctrine/coding-standard": "^4.0",
+                "doctrine/coding-standard": "^6.0",
                 "phpunit/phpunit": "^7.0"
             },
             "type": "library",
@@ -454,6 +472,10 @@
                 "MIT"
             ],
             "authors": [
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
                 {
                     "name": "Roman Borschel",
                     "email": "roman@code-factory.org"
@@ -462,10 +484,6 @@
                     "name": "Benjamin Eberlei",
                     "email": "kontakt@beberlei.de"
                 },
-                {
-                    "name": "Guilherme Blanco",
-                    "email": "guilhermeblanco@gmail.com"
-                },
                 {
                     "name": "Jonathan Wage",
                     "email": "jonwage@gmail.com"
@@ -479,27 +497,29 @@
                     "email": "ocramius@gmail.com"
                 }
             ],
-            "description": "Doctrine Event Manager component",
+            "description": "The Doctrine Event Manager is a simple PHP event system that was built to be used with the various Doctrine projects.",
             "homepage": "https://www.doctrine-project.org/projects/event-manager.html",
             "keywords": [
                 "event",
-                "eventdispatcher",
-                "eventmanager"
+                "event dispatcher",
+                "event manager",
+                "event system",
+                "events"
             ],
-            "time": "2018-06-11T11:59:03+00:00"
+            "time": "2019-11-10T09:48:07+00:00"
         },
         {
             "name": "doctrine/inflector",
-            "version": "v1.3.0",
+            "version": "1.3.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/inflector.git",
-                "reference": "5527a48b7313d15261292c149e55e26eae771b0a"
+                "reference": "ec3a55242203ffa6a4b27c58176da97ff0a7aec1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/inflector/zipball/5527a48b7313d15261292c149e55e26eae771b0a",
-                "reference": "5527a48b7313d15261292c149e55e26eae771b0a",
+                "url": "https://api.github.com/repos/doctrine/inflector/zipball/ec3a55242203ffa6a4b27c58176da97ff0a7aec1",
+                "reference": "ec3a55242203ffa6a4b27c58176da97ff0a7aec1",
                 "shasum": ""
             },
             "require": {
@@ -524,6 +544,10 @@
                 "MIT"
             ],
             "authors": [
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
                 {
                     "name": "Roman Borschel",
                     "email": "roman@code-factory.org"
@@ -532,10 +556,6 @@
                     "name": "Benjamin Eberlei",
                     "email": "kontakt@beberlei.de"
                 },
-                {
-                    "name": "Guilherme Blanco",
-                    "email": "guilhermeblanco@gmail.com"
-                },
                 {
                     "name": "Jonathan Wage",
                     "email": "jonwage@gmail.com"
@@ -553,20 +573,20 @@
                 "singularize",
                 "string"
             ],
-            "time": "2018-01-09T20:05:19+00:00"
+            "time": "2019-10-30T19:59:35+00:00"
         },
         {
             "name": "doctrine/lexer",
-            "version": "1.1.0",
+            "version": "1.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/lexer.git",
-                "reference": "e17f069ede36f7534b95adec71910ed1b49c74ea"
+                "reference": "5242d66dbeb21a30dd8a3e66bf7a73b66e05e1f6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/lexer/zipball/e17f069ede36f7534b95adec71910ed1b49c74ea",
-                "reference": "e17f069ede36f7534b95adec71910ed1b49c74ea",
+                "url": "https://api.github.com/repos/doctrine/lexer/zipball/5242d66dbeb21a30dd8a3e66bf7a73b66e05e1f6",
+                "reference": "5242d66dbeb21a30dd8a3e66bf7a73b66e05e1f6",
                 "shasum": ""
             },
             "require": {
@@ -580,7 +600,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.1.x-dev"
+                    "dev-master": "1.2.x-dev"
                 }
             },
             "autoload": {
@@ -615,7 +635,7 @@
                 "parser",
                 "php"
             ],
-            "time": "2019-07-30T19:33:28+00:00"
+            "time": "2019-10-30T14:39:59+00:00"
         },
         {
             "name": "dompdf/dompdf",
@@ -946,27 +966,28 @@
         },
         {
             "name": "guzzlehttp/guzzle",
-            "version": "6.3.3",
+            "version": "6.4.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/guzzle.git",
-                "reference": "407b0cb880ace85c9b63c5f9551db498cb2d50ba"
+                "reference": "0895c932405407fd3a7368b6910c09a24d26db11"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/407b0cb880ace85c9b63c5f9551db498cb2d50ba",
-                "reference": "407b0cb880ace85c9b63c5f9551db498cb2d50ba",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/0895c932405407fd3a7368b6910c09a24d26db11",
+                "reference": "0895c932405407fd3a7368b6910c09a24d26db11",
                 "shasum": ""
             },
             "require": {
+                "ext-json": "*",
                 "guzzlehttp/promises": "^1.0",
-                "guzzlehttp/psr7": "^1.4",
+                "guzzlehttp/psr7": "^1.6.1",
                 "php": ">=5.5"
             },
             "require-dev": {
                 "ext-curl": "*",
                 "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.4 || ^7.0",
-                "psr/log": "^1.0"
+                "psr/log": "^1.1"
             },
             "suggest": {
                 "psr/log": "Required for using the Log middleware"
@@ -978,12 +999,12 @@
                 }
             },
             "autoload": {
-                "files": [
-                    "src/functions_include.php"
-                ],
                 "psr-4": {
                     "GuzzleHttp\\": "src/"
-                }
+                },
+                "files": [
+                    "src/functions_include.php"
+                ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
@@ -1007,7 +1028,7 @@
                 "rest",
                 "web service"
             ],
-            "time": "2018-04-22T15:46:56+00:00"
+            "time": "2019-10-23T15:58:00+00:00"
         },
         {
             "name": "guzzlehttp/promises",
@@ -1133,16 +1154,16 @@
         },
         {
             "name": "intervention/image",
-            "version": "2.5.0",
+            "version": "2.5.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Intervention/image.git",
-                "reference": "39eaef720d082ecc54c64bf54541c55f10db546d"
+                "reference": "abbf18d5ab8367f96b3205ca3c89fb2fa598c69e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Intervention/image/zipball/39eaef720d082ecc54c64bf54541c55f10db546d",
-                "reference": "39eaef720d082ecc54c64bf54541c55f10db546d",
+                "url": "https://api.github.com/repos/Intervention/image/zipball/abbf18d5ab8367f96b3205ca3c89fb2fa598c69e",
+                "reference": "abbf18d5ab8367f96b3205ca3c89fb2fa598c69e",
                 "shasum": ""
             },
             "require": {
@@ -1199,7 +1220,7 @@
                 "thumbnail",
                 "watermark"
             ],
-            "time": "2019-06-24T14:06:31+00:00"
+            "time": "2019-11-02T09:15:47+00:00"
         },
         {
             "name": "knplabs/knp-snappy",
@@ -1269,16 +1290,16 @@
         },
         {
             "name": "laravel/framework",
-            "version": "v6.0.3",
+            "version": "v6.5.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/laravel/framework.git",
-                "reference": "56789e9dec750e0fbe8e9e6ae90a01a4e6887902"
+                "reference": "e47180500498cf8aa2a8ffb59a3b4daa007fa13d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/laravel/framework/zipball/56789e9dec750e0fbe8e9e6ae90a01a4e6887902",
-                "reference": "56789e9dec750e0fbe8e9e6ae90a01a4e6887902",
+                "url": "https://api.github.com/repos/laravel/framework/zipball/e47180500498cf8aa2a8ffb59a3b4daa007fa13d",
+                "reference": "e47180500498cf8aa2a8ffb59a3b4daa007fa13d",
                 "shasum": ""
             },
             "require": {
@@ -1374,7 +1395,8 @@
                 "league/flysystem-sftp": "Required to use the Flysystem SFTP driver (^1.0).",
                 "moontoast/math": "Required to use ordered UUIDs (^1.1).",
                 "pda/pheanstalk": "Required to use the beanstalk queue driver (^4.0).",
-                "pusher/pusher-php-server": "Required to use the Pusher broadcast driver (^3.0).",
+                "psr/http-message": "Required to allow Storage::put to accept a StreamInterface (^1.0)",
+                "pusher/pusher-php-server": "Required to use the Pusher broadcast driver (^4.0).",
                 "symfony/cache": "Required to PSR-6 cache bridge (^4.3.4).",
                 "symfony/psr-http-message-bridge": "Required to use PSR-7 bridging features (^1.2).",
                 "wildbit/swiftmailer-postmark": "Required to use Postmark mail driver (^3.0)."
@@ -1410,7 +1432,7 @@
                 "framework",
                 "laravel"
             ],
-            "time": "2019-09-10T18:46:24+00:00"
+            "time": "2019-11-12T15:20:18+00:00"
         },
         {
             "name": "laravel/socialite",
@@ -1478,16 +1500,16 @@
         },
         {
             "name": "league/flysystem",
-            "version": "1.0.55",
+            "version": "1.0.57",
             "source": {
                 "type": "git",
                 "url": "https://github.com/thephpleague/flysystem.git",
-                "reference": "33c91155537c6dc899eacdc54a13ac6303f156e6"
+                "reference": "0e9db7f0b96b9f12dcf6f65bc34b72b1a30ea55a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/thephpleague/flysystem/zipball/33c91155537c6dc899eacdc54a13ac6303f156e6",
-                "reference": "33c91155537c6dc899eacdc54a13ac6303f156e6",
+                "url": "https://api.github.com/repos/thephpleague/flysystem/zipball/0e9db7f0b96b9f12dcf6f65bc34b72b1a30ea55a",
+                "reference": "0e9db7f0b96b9f12dcf6f65bc34b72b1a30ea55a",
                 "shasum": ""
             },
             "require": {
@@ -1558,7 +1580,7 @@
                 "sftp",
                 "storage"
             ],
-            "time": "2019-08-24T11:17:19+00:00"
+            "time": "2019-10-16T21:01:05+00:00"
         },
         {
             "name": "league/flysystem-aws-s3-v3",
@@ -1672,16 +1694,16 @@
         },
         {
             "name": "monolog/monolog",
-            "version": "2.0.0",
+            "version": "2.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Seldaek/monolog.git",
-                "reference": "68545165e19249013afd1d6f7485aecff07a2d22"
+                "reference": "f9d56fd2f5533322caccdfcddbb56aedd622ef1c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/68545165e19249013afd1d6f7485aecff07a2d22",
-                "reference": "68545165e19249013afd1d6f7485aecff07a2d22",
+                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/f9d56fd2f5533322caccdfcddbb56aedd622ef1c",
+                "reference": "f9d56fd2f5533322caccdfcddbb56aedd622ef1c",
                 "shasum": ""
             },
             "require": {
@@ -1749,7 +1771,7 @@
                 "logging",
                 "psr-3"
             ],
-            "time": "2019-08-30T09:56:44+00:00"
+            "time": "2019-11-13T10:27:43+00:00"
         },
         {
             "name": "mtdowling/jmespath.php",
@@ -1808,16 +1830,16 @@
         },
         {
             "name": "nesbot/carbon",
-            "version": "2.24.0",
+            "version": "2.26.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/briannesbitt/Carbon.git",
-                "reference": "934459c5ac0658bc765ad1e53512c7c77adcac29"
+                "reference": "e01ecc0b71168febb52ae1fdc1cfcc95428e604e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/briannesbitt/Carbon/zipball/934459c5ac0658bc765ad1e53512c7c77adcac29",
-                "reference": "934459c5ac0658bc765ad1e53512c7c77adcac29",
+                "url": "https://api.github.com/repos/briannesbitt/Carbon/zipball/e01ecc0b71168febb52ae1fdc1cfcc95428e604e",
+                "reference": "e01ecc0b71168febb52ae1fdc1cfcc95428e604e",
                 "shasum": ""
             },
             "require": {
@@ -1864,27 +1886,77 @@
                     "homepage": "http://github.com/kylekatarnls"
                 }
             ],
-            "description": "A API extension for DateTime that supports 281 different languages.",
+            "description": "An API extension for DateTime that supports 281 different languages.",
             "homepage": "http://carbon.nesbot.com",
             "keywords": [
                 "date",
                 "datetime",
                 "time"
             ],
-            "time": "2019-08-31T16:37:55+00:00"
+            "time": "2019-10-21T21:32:25+00:00"
         },
         {
-            "name": "opis/closure",
-            "version": "3.4.0",
+            "name": "onelogin/php-saml",
+            "version": "3.3.1",
             "source": {
                 "type": "git",
-                "url": "https://github.com/opis/closure.git",
-                "reference": "60a97fff133b1669a5b1776aa8ab06db3f3962b7"
+                "url": "https://github.com/onelogin/php-saml.git",
+                "reference": "bb34489635cd5c7eb1b42833e4c57ca1c786a81a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/opis/closure/zipball/60a97fff133b1669a5b1776aa8ab06db3f3962b7",
-                "reference": "60a97fff133b1669a5b1776aa8ab06db3f3962b7",
+                "url": "https://api.github.com/repos/onelogin/php-saml/zipball/bb34489635cd5c7eb1b42833e4c57ca1c786a81a",
+                "reference": "bb34489635cd5c7eb1b42833e4c57ca1c786a81a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4",
+                "robrichards/xmlseclibs": ">=3.0.4"
+            },
+            "require-dev": {
+                "pdepend/pdepend": "^2.5.0",
+                "php-coveralls/php-coveralls": "^1.0.2 || ^2.0",
+                "phploc/phploc": "^2.1 || ^3.0 || ^4.0",
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5 || ^7.1",
+                "sebastian/phpcpd": "^2.0 || ^3.0 || ^4.0",
+                "squizlabs/php_codesniffer": "^3.1.1"
+            },
+            "suggest": {
+                "ext-curl": "Install curl lib to be able to use the IdPMetadataParser for parsing remote XMLs",
+                "ext-gettext": "Install gettext and php5-gettext libs to handle translations",
+                "ext-openssl": "Install openssl lib in order to handle with x509 certs (require to support sign and encryption)"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "OneLogin\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "OneLogin PHP SAML Toolkit",
+            "homepage": "https://developers.onelogin.com/saml/php",
+            "keywords": [
+                "SAML2",
+                "onelogin",
+                "saml"
+            ],
+            "time": "2019-11-06T16:59:38+00:00"
+        },
+        {
+            "name": "opis/closure",
+            "version": "3.4.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/opis/closure.git",
+                "reference": "e79f851749c3caa836d7ccc01ede5828feb762c7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/opis/closure/zipball/e79f851749c3caa836d7ccc01ede5828feb762c7",
+                "reference": "e79f851749c3caa836d7ccc01ede5828feb762c7",
                 "shasum": ""
             },
             "require": {
@@ -1932,7 +2004,7 @@
                 "serialization",
                 "serialize"
             ],
-            "time": "2019-09-02T21:07:33+00:00"
+            "time": "2019-10-19T18:38:51+00:00"
         },
         {
             "name": "paragonie/random_compat",
@@ -2058,28 +2130,28 @@
         },
         {
             "name": "phpoption/phpoption",
-            "version": "1.5.0",
+            "version": "1.5.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/schmittjoh/php-option.git",
-                "reference": "94e644f7d2051a5f0fcf77d81605f152eecff0ed"
+                "reference": "2ba2586380f8d2b44ad1b9feb61c371020b27793"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/schmittjoh/php-option/zipball/94e644f7d2051a5f0fcf77d81605f152eecff0ed",
-                "reference": "94e644f7d2051a5f0fcf77d81605f152eecff0ed",
+                "url": "https://api.github.com/repos/schmittjoh/php-option/zipball/2ba2586380f8d2b44ad1b9feb61c371020b27793",
+                "reference": "2ba2586380f8d2b44ad1b9feb61c371020b27793",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "4.7.*"
+                "phpunit/phpunit": "^4.7|^5.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.3-dev"
+                    "dev-master": "1.5-dev"
                 }
             },
             "autoload": {
@@ -2089,7 +2161,7 @@
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
-                "Apache2"
+                "Apache-2.0"
             ],
             "authors": [
                 {
@@ -2104,7 +2176,7 @@
                 "php",
                 "type"
             ],
-            "time": "2015-07-25T16:39:46+00:00"
+            "time": "2019-11-06T22:27:00+00:00"
         },
         {
             "name": "predis/predis",
@@ -2257,16 +2329,16 @@
         },
         {
             "name": "psr/log",
-            "version": "1.1.0",
+            "version": "1.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/php-fig/log.git",
-                "reference": "6c001f1daafa3a3ac1d8ff69ee4db8e799a654dd"
+                "reference": "446d54b4cb6bf489fc9d75f55843658e6f25d801"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/log/zipball/6c001f1daafa3a3ac1d8ff69ee4db8e799a654dd",
-                "reference": "6c001f1daafa3a3ac1d8ff69ee4db8e799a654dd",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/446d54b4cb6bf489fc9d75f55843658e6f25d801",
+                "reference": "446d54b4cb6bf489fc9d75f55843658e6f25d801",
                 "shasum": ""
             },
             "require": {
@@ -2275,7 +2347,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "1.1.x-dev"
                 }
             },
             "autoload": {
@@ -2300,7 +2372,7 @@
                 "psr",
                 "psr-3"
             ],
-            "time": "2018-11-20T15:27:04+00:00"
+            "time": "2019-11-01T11:05:21+00:00"
         },
         {
             "name": "psr/simple-cache",
@@ -2472,6 +2544,44 @@
             ],
             "time": "2018-07-19T23:38:55+00:00"
         },
+        {
+            "name": "robrichards/xmlseclibs",
+            "version": "3.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/robrichards/xmlseclibs.git",
+                "reference": "0a53d3c3aa87564910cae4ed01416441d3ae0db5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/robrichards/xmlseclibs/zipball/0a53d3c3aa87564910cae4ed01416441d3ae0db5",
+                "reference": "0a53d3c3aa87564910cae4ed01416441d3ae0db5",
+                "shasum": ""
+            },
+            "require": {
+                "ext-openssl": "*",
+                "php": ">= 5.4"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "RobRichards\\XMLSecLibs\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "description": "A PHP library for XML Security",
+            "homepage": "https://github.com/robrichards/xmlseclibs",
+            "keywords": [
+                "security",
+                "signature",
+                "xml",
+                "xmldsig"
+            ],
+            "time": "2019-11-05T11:44:22+00:00"
+        },
         {
             "name": "sabberworm/php-css-parser",
             "version": "8.3.0",
@@ -2593,16 +2703,16 @@
         },
         {
             "name": "socialiteproviders/manager",
-            "version": "v3.4.2",
+            "version": "v3.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/SocialiteProviders/Manager.git",
-                "reference": "e3e8e78b9a3060801cd008941a0894a0a0c479e1"
+                "reference": "09903d33429f9f6c0da32c545c036a3e18964bbf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/SocialiteProviders/Manager/zipball/e3e8e78b9a3060801cd008941a0894a0a0c479e1",
-                "reference": "e3e8e78b9a3060801cd008941a0894a0a0c479e1",
+                "url": "https://api.github.com/repos/SocialiteProviders/Manager/zipball/09903d33429f9f6c0da32c545c036a3e18964bbf",
+                "reference": "09903d33429f9f6c0da32c545c036a3e18964bbf",
                 "shasum": ""
             },
             "require": {
@@ -2646,7 +2756,7 @@
                 }
             ],
             "description": "Easily add new or override built-in providers in Laravel Socialite.",
-            "time": "2019-09-09T03:07:52+00:00"
+            "time": "2019-09-25T06:06:35+00:00"
         },
         {
             "name": "socialiteproviders/microsoft-azure",
@@ -2724,16 +2834,16 @@
         },
         {
             "name": "socialiteproviders/slack",
-            "version": "v3.0.3",
+            "version": "v3.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/SocialiteProviders/Slack.git",
-                "reference": "8d5d0c0c916adf2af6b406679130441db0afc387"
+                "reference": "d46826640fbeae8f34328d99c358404a1e1050a3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/SocialiteProviders/Slack/zipball/8d5d0c0c916adf2af6b406679130441db0afc387",
-                "reference": "8d5d0c0c916adf2af6b406679130441db0afc387",
+                "url": "https://api.github.com/repos/SocialiteProviders/Slack/zipball/d46826640fbeae8f34328d99c358404a1e1050a3",
+                "reference": "d46826640fbeae8f34328d99c358404a1e1050a3",
                 "shasum": ""
             },
             "require": {
@@ -2757,20 +2867,20 @@
                 }
             ],
             "description": "Slack OAuth2 Provider for Laravel Socialite",
-            "time": "2017-04-10T05:10:48+00:00"
+            "time": "2019-01-11T19:48:14+00:00"
         },
         {
             "name": "socialiteproviders/twitch",
-            "version": "v5.0.0",
+            "version": "v5.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/SocialiteProviders/Twitch.git",
-                "reference": "8c19b26ff24c40cc019413042a5492c5ed21a658"
+                "reference": "f9b1f90a94f539e1b29e84ee0f731f42d59f3213"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/SocialiteProviders/Twitch/zipball/8c19b26ff24c40cc019413042a5492c5ed21a658",
-                "reference": "8c19b26ff24c40cc019413042a5492c5ed21a658",
+                "url": "https://api.github.com/repos/SocialiteProviders/Twitch/zipball/f9b1f90a94f539e1b29e84ee0f731f42d59f3213",
+                "reference": "f9b1f90a94f539e1b29e84ee0f731f42d59f3213",
                 "shasum": ""
             },
             "require": {
@@ -2794,20 +2904,20 @@
                 }
             ],
             "description": "Twitch OAuth2 Provider for Laravel Socialite",
-            "time": "2018-06-20T10:59:51+00:00"
+            "time": "2019-07-01T10:35:46+00:00"
         },
         {
             "name": "swiftmailer/swiftmailer",
-            "version": "v6.2.1",
+            "version": "v6.2.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/swiftmailer/swiftmailer.git",
-                "reference": "5397cd05b0a0f7937c47b0adcb4c60e5ab936b6a"
+                "reference": "149cfdf118b169f7840bbe3ef0d4bc795d1780c9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/swiftmailer/swiftmailer/zipball/5397cd05b0a0f7937c47b0adcb4c60e5ab936b6a",
-                "reference": "5397cd05b0a0f7937c47b0adcb4c60e5ab936b6a",
+                "url": "https://api.github.com/repos/swiftmailer/swiftmailer/zipball/149cfdf118b169f7840bbe3ef0d4bc795d1780c9",
+                "reference": "149cfdf118b169f7840bbe3ef0d4bc795d1780c9",
                 "shasum": ""
             },
             "require": {
@@ -2856,20 +2966,20 @@
                 "mail",
                 "mailer"
             ],
-            "time": "2019-04-21T09:21:45+00:00"
+            "time": "2019-11-12T09:31:26+00:00"
         },
         {
             "name": "symfony/console",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "de63799239b3881b8a08f8481b22348f77ed7b36"
+                "reference": "831424efae0a1fe6642784bd52aae14ece6538e6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/de63799239b3881b8a08f8481b22348f77ed7b36",
-                "reference": "de63799239b3881b8a08f8481b22348f77ed7b36",
+                "url": "https://api.github.com/repos/symfony/console/zipball/831424efae0a1fe6642784bd52aae14ece6538e6",
+                "reference": "831424efae0a1fe6642784bd52aae14ece6538e6",
                 "shasum": ""
             },
             "require": {
@@ -2931,20 +3041,20 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-26T08:26:39+00:00"
+            "time": "2019-11-13T07:29:07+00:00"
         },
         {
             "name": "symfony/css-selector",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/css-selector.git",
-                "reference": "c6e5e2a00db768c92c3ae131532af4e1acc7bd03"
+                "reference": "f4b3ff6a549d9ed28b2b0ecd1781bf67cf220ee9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/css-selector/zipball/c6e5e2a00db768c92c3ae131532af4e1acc7bd03",
-                "reference": "c6e5e2a00db768c92c3ae131532af4e1acc7bd03",
+                "url": "https://api.github.com/repos/symfony/css-selector/zipball/f4b3ff6a549d9ed28b2b0ecd1781bf67cf220ee9",
+                "reference": "f4b3ff6a549d9ed28b2b0ecd1781bf67cf220ee9",
                 "shasum": ""
             },
             "require": {
@@ -2984,20 +3094,20 @@
             ],
             "description": "Symfony CssSelector Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-20T14:07:54+00:00"
+            "time": "2019-10-02T08:36:26+00:00"
         },
         {
             "name": "symfony/debug",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/debug.git",
-                "reference": "afcdea44a2e399c1e4b52246ec8d54c715393ced"
+                "reference": "5ea9c3e01989a86ceaa0283f21234b12deadf5e2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/debug/zipball/afcdea44a2e399c1e4b52246ec8d54c715393ced",
-                "reference": "afcdea44a2e399c1e4b52246ec8d54c715393ced",
+                "url": "https://api.github.com/repos/symfony/debug/zipball/5ea9c3e01989a86ceaa0283f21234b12deadf5e2",
+                "reference": "5ea9c3e01989a86ceaa0283f21234b12deadf5e2",
                 "shasum": ""
             },
             "require": {
@@ -3040,20 +3150,20 @@
             ],
             "description": "Symfony Debug Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-20T14:27:59+00:00"
+            "time": "2019-10-28T17:07:32+00:00"
         },
         {
             "name": "symfony/event-dispatcher",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher.git",
-                "reference": "429d0a1451d4c9c4abe1959b2986b88794b9b7d2"
+                "reference": "0df002fd4f500392eabd243c2947061a50937287"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/429d0a1451d4c9c4abe1959b2986b88794b9b7d2",
-                "reference": "429d0a1451d4c9c4abe1959b2986b88794b9b7d2",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/0df002fd4f500392eabd243c2947061a50937287",
+                "reference": "0df002fd4f500392eabd243c2947061a50937287",
                 "shasum": ""
             },
             "require": {
@@ -3110,20 +3220,20 @@
             ],
             "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-26T08:55:16+00:00"
+            "time": "2019-11-03T09:04:05+00:00"
         },
         {
             "name": "symfony/event-dispatcher-contracts",
-            "version": "v1.1.5",
+            "version": "v1.1.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher-contracts.git",
-                "reference": "c61766f4440ca687de1084a5c00b08e167a2575c"
+                "reference": "c43ab685673fb6c8d84220c77897b1d6cdbe1d18"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/event-dispatcher-contracts/zipball/c61766f4440ca687de1084a5c00b08e167a2575c",
-                "reference": "c61766f4440ca687de1084a5c00b08e167a2575c",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher-contracts/zipball/c43ab685673fb6c8d84220c77897b1d6cdbe1d18",
+                "reference": "c43ab685673fb6c8d84220c77897b1d6cdbe1d18",
                 "shasum": ""
             },
             "require": {
@@ -3168,20 +3278,20 @@
                 "interoperability",
                 "standards"
             ],
-            "time": "2019-06-20T06:46:26+00:00"
+            "time": "2019-09-17T09:54:03+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "86c1c929f0a4b24812e1eb109262fc3372c8e9f2"
+                "reference": "72a068f77e317ae77c0a0495236ad292cfb5ce6f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/86c1c929f0a4b24812e1eb109262fc3372c8e9f2",
-                "reference": "86c1c929f0a4b24812e1eb109262fc3372c8e9f2",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/72a068f77e317ae77c0a0495236ad292cfb5ce6f",
+                "reference": "72a068f77e317ae77c0a0495236ad292cfb5ce6f",
                 "shasum": ""
             },
             "require": {
@@ -3217,20 +3327,20 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-14T12:26:46+00:00"
+            "time": "2019-10-30T12:53:54+00:00"
         },
         {
             "name": "symfony/http-foundation",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/http-foundation.git",
-                "reference": "d804bea118ff340a12e22a79f9c7e7eb56b35adc"
+                "reference": "cabe67275034e173350e158f3b1803d023880227"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/http-foundation/zipball/d804bea118ff340a12e22a79f9c7e7eb56b35adc",
-                "reference": "d804bea118ff340a12e22a79f9c7e7eb56b35adc",
+                "url": "https://api.github.com/repos/symfony/http-foundation/zipball/cabe67275034e173350e158f3b1803d023880227",
+                "reference": "cabe67275034e173350e158f3b1803d023880227",
                 "shasum": ""
             },
             "require": {
@@ -3272,20 +3382,20 @@
             ],
             "description": "Symfony HttpFoundation Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-26T08:55:16+00:00"
+            "time": "2019-11-12T13:07:20+00:00"
         },
         {
             "name": "symfony/http-kernel",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/http-kernel.git",
-                "reference": "5e0fc71be03d52cd00c423061cfd300bd6f92a52"
+                "reference": "5fdf186f26f9080de531d3f1d024348b2f0ab12f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/http-kernel/zipball/5e0fc71be03d52cd00c423061cfd300bd6f92a52",
-                "reference": "5e0fc71be03d52cd00c423061cfd300bd6f92a52",
+                "url": "https://api.github.com/repos/symfony/http-kernel/zipball/5fdf186f26f9080de531d3f1d024348b2f0ab12f",
+                "reference": "5fdf186f26f9080de531d3f1d024348b2f0ab12f",
                 "shasum": ""
             },
             "require": {
@@ -3364,20 +3474,20 @@
             ],
             "description": "Symfony HttpKernel Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-26T16:47:42+00:00"
+            "time": "2019-11-13T09:07:28+00:00"
         },
         {
             "name": "symfony/mime",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/mime.git",
-                "reference": "987a05df1c6ac259b34008b932551353f4f408df"
+                "reference": "22aecf6b11638ef378fab25d6c5a2da8a31a1448"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/mime/zipball/987a05df1c6ac259b34008b932551353f4f408df",
-                "reference": "987a05df1c6ac259b34008b932551353f4f408df",
+                "url": "https://api.github.com/repos/symfony/mime/zipball/22aecf6b11638ef378fab25d6c5a2da8a31a1448",
+                "reference": "22aecf6b11638ef378fab25d6c5a2da8a31a1448",
                 "shasum": ""
             },
             "require": {
@@ -3423,7 +3533,7 @@
                 "mime",
                 "mime-type"
             ],
-            "time": "2019-08-22T08:16:11+00:00"
+            "time": "2019-11-12T13:10:02+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
@@ -3778,16 +3888,16 @@
         },
         {
             "name": "symfony/process",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "e89969c00d762349f078db1128506f7f3dcc0d4a"
+                "reference": "3b2e0cb029afbb0395034509291f21191d1a4db0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/e89969c00d762349f078db1128506f7f3dcc0d4a",
-                "reference": "e89969c00d762349f078db1128506f7f3dcc0d4a",
+                "url": "https://api.github.com/repos/symfony/process/zipball/3b2e0cb029afbb0395034509291f21191d1a4db0",
+                "reference": "3b2e0cb029afbb0395034509291f21191d1a4db0",
                 "shasum": ""
             },
             "require": {
@@ -3823,20 +3933,20 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-26T08:26:39+00:00"
+            "time": "2019-10-28T17:07:32+00:00"
         },
         {
             "name": "symfony/routing",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/routing.git",
-                "reference": "ff1049f6232dc5b6023b1ff1c6de56f82bcd264f"
+                "reference": "533fd12a41fb9ce8d4e861693365427849487c0e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/routing/zipball/ff1049f6232dc5b6023b1ff1c6de56f82bcd264f",
-                "reference": "ff1049f6232dc5b6023b1ff1c6de56f82bcd264f",
+                "url": "https://api.github.com/repos/symfony/routing/zipball/533fd12a41fb9ce8d4e861693365427849487c0e",
+                "reference": "533fd12a41fb9ce8d4e861693365427849487c0e",
                 "shasum": ""
             },
             "require": {
@@ -3899,20 +4009,20 @@
                 "uri",
                 "url"
             ],
-            "time": "2019-08-26T08:26:39+00:00"
+            "time": "2019-11-04T20:23:03+00:00"
         },
         {
             "name": "symfony/service-contracts",
-            "version": "v1.1.6",
+            "version": "v1.1.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/service-contracts.git",
-                "reference": "ea7263d6b6d5f798b56a45a5b8d686725f2719a3"
+                "reference": "ffc7f5692092df31515df2a5ecf3b7302b3ddacf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/ea7263d6b6d5f798b56a45a5b8d686725f2719a3",
-                "reference": "ea7263d6b6d5f798b56a45a5b8d686725f2719a3",
+                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/ffc7f5692092df31515df2a5ecf3b7302b3ddacf",
+                "reference": "ffc7f5692092df31515df2a5ecf3b7302b3ddacf",
                 "shasum": ""
             },
             "require": {
@@ -3957,20 +4067,20 @@
                 "interoperability",
                 "standards"
             ],
-            "time": "2019-08-20T14:44:19+00:00"
+            "time": "2019-10-14T12:27:06+00:00"
         },
         {
             "name": "symfony/translation",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/translation.git",
-                "reference": "28498169dd334095fa981827992f3a24d50fed0f"
+                "reference": "bbce239b35b0cd47bd75848b23e969f17dd970e7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/translation/zipball/28498169dd334095fa981827992f3a24d50fed0f",
-                "reference": "28498169dd334095fa981827992f3a24d50fed0f",
+                "url": "https://api.github.com/repos/symfony/translation/zipball/bbce239b35b0cd47bd75848b23e969f17dd970e7",
+                "reference": "bbce239b35b0cd47bd75848b23e969f17dd970e7",
                 "shasum": ""
             },
             "require": {
@@ -4033,20 +4143,20 @@
             ],
             "description": "Symfony Translation Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-26T08:55:16+00:00"
+            "time": "2019-11-06T23:21:49+00:00"
         },
         {
             "name": "symfony/translation-contracts",
-            "version": "v1.1.6",
+            "version": "v1.1.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/translation-contracts.git",
-                "reference": "325b17c24f3ee23cbecfa63ba809c6d89b5fa04a"
+                "reference": "364518c132c95642e530d9b2d217acbc2ccac3e6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/translation-contracts/zipball/325b17c24f3ee23cbecfa63ba809c6d89b5fa04a",
-                "reference": "325b17c24f3ee23cbecfa63ba809c6d89b5fa04a",
+                "url": "https://api.github.com/repos/symfony/translation-contracts/zipball/364518c132c95642e530d9b2d217acbc2ccac3e6",
+                "reference": "364518c132c95642e530d9b2d217acbc2ccac3e6",
                 "shasum": ""
             },
             "require": {
@@ -4090,20 +4200,20 @@
                 "interoperability",
                 "standards"
             ],
-            "time": "2019-08-02T12:15:04+00:00"
+            "time": "2019-09-17T11:12:18+00:00"
         },
         {
             "name": "symfony/var-dumper",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/var-dumper.git",
-                "reference": "641043e0f3e615990a0f29479f9c117e8a6698c6"
+                "reference": "ea4940845535c85ff5c505e13b3205b0076d07bf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/var-dumper/zipball/641043e0f3e615990a0f29479f9c117e8a6698c6",
-                "reference": "641043e0f3e615990a0f29479f9c117e8a6698c6",
+                "url": "https://api.github.com/repos/symfony/var-dumper/zipball/ea4940845535c85ff5c505e13b3205b0076d07bf",
+                "reference": "ea4940845535c85ff5c505e13b3205b0076d07bf",
                 "shasum": ""
             },
             "require": {
@@ -4166,25 +4276,27 @@
                 "debug",
                 "dump"
             ],
-            "time": "2019-08-26T08:26:39+00:00"
+            "time": "2019-10-13T12:02:04+00:00"
         },
         {
             "name": "tijsverkoyen/css-to-inline-styles",
-            "version": "2.2.1",
+            "version": "2.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/tijsverkoyen/CssToInlineStyles.git",
-                "reference": "0ed4a2ea4e0902dac0489e6436ebcd5bbcae9757"
+                "reference": "dda2ee426acd6d801d5b7fd1001cde9b5f790e15"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/tijsverkoyen/CssToInlineStyles/zipball/0ed4a2ea4e0902dac0489e6436ebcd5bbcae9757",
-                "reference": "0ed4a2ea4e0902dac0489e6436ebcd5bbcae9757",
+                "url": "https://api.github.com/repos/tijsverkoyen/CssToInlineStyles/zipball/dda2ee426acd6d801d5b7fd1001cde9b5f790e15",
+                "reference": "dda2ee426acd6d801d5b7fd1001cde9b5f790e15",
                 "shasum": ""
             },
             "require": {
+                "ext-dom": "*",
+                "ext-libxml": "*",
                 "php": "^5.5 || ^7.0",
-                "symfony/css-selector": "^2.7 || ^3.0 || ^4.0"
+                "symfony/css-selector": "^2.7 || ^3.0 || ^4.0 || ^5.0"
             },
             "require-dev": {
                 "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.0"
@@ -4213,7 +4325,7 @@
             ],
             "description": "CssToInlineStyles is a class that enables you to convert HTML-pages/files into HTML-pages/files with inline styles. This is very useful when you're sending emails.",
             "homepage": "https://github.com/tijsverkoyen/CssToInlineStyles",
-            "time": "2017-11-27T11:13:29+00:00"
+            "time": "2019-10-24T08:53:34+00:00"
         },
         {
             "name": "vlucas/phpdotenv",
@@ -4520,16 +4632,16 @@
         },
         {
             "name": "composer/composer",
-            "version": "1.9.0",
+            "version": "1.9.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/composer.git",
-                "reference": "314aa57fdcfc942065996f59fb73a8b3f74f3fa5"
+                "reference": "bb01f2180df87ce7992b8331a68904f80439dd2f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/composer/zipball/314aa57fdcfc942065996f59fb73a8b3f74f3fa5",
-                "reference": "314aa57fdcfc942065996f59fb73a8b3f74f3fa5",
+                "url": "https://api.github.com/repos/composer/composer/zipball/bb01f2180df87ce7992b8331a68904f80439dd2f",
+                "reference": "bb01f2180df87ce7992b8331a68904f80439dd2f",
                 "shasum": ""
             },
             "require": {
@@ -4596,7 +4708,7 @@
                 "dependency",
                 "package"
             ],
-            "time": "2019-08-02T18:55:33+00:00"
+            "time": "2019-11-01T16:20:17+00:00"
         },
         {
             "name": "composer/semver",
@@ -4722,24 +4834,24 @@
         },
         {
             "name": "composer/xdebug-handler",
-            "version": "1.3.3",
+            "version": "1.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/xdebug-handler.git",
-                "reference": "46867cbf8ca9fb8d60c506895449eb799db1184f"
+                "reference": "cbe23383749496fe0f373345208b79568e4bc248"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/46867cbf8ca9fb8d60c506895449eb799db1184f",
-                "reference": "46867cbf8ca9fb8d60c506895449eb799db1184f",
+                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/cbe23383749496fe0f373345208b79568e4bc248",
+                "reference": "cbe23383749496fe0f373345208b79568e4bc248",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.3.2 || ^7.0",
+                "php": "^5.3.2 || ^7.0 || ^8.0",
                 "psr/log": "^1.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5"
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || 6.5 - 8"
             },
             "type": "library",
             "autoload": {
@@ -4757,25 +4869,25 @@
                     "email": "john-stevenson@blueyonder.co.uk"
                 }
             ],
-            "description": "Restarts a process without xdebug.",
+            "description": "Restarts a process without Xdebug.",
             "keywords": [
                 "Xdebug",
                 "performance"
             ],
-            "time": "2019-05-27T17:52:04+00:00"
+            "time": "2019-11-06T16:40:04+00:00"
         },
         {
             "name": "doctrine/instantiator",
-            "version": "1.2.0",
+            "version": "1.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "a2c590166b2133a4633738648b6b064edae0814a"
+                "reference": "ae466f726242e637cebdd526a7d991b9433bacf1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/a2c590166b2133a4633738648b6b064edae0814a",
-                "reference": "a2c590166b2133a4633738648b6b064edae0814a",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/ae466f726242e637cebdd526a7d991b9433bacf1",
+                "reference": "ae466f726242e637cebdd526a7d991b9433bacf1",
                 "shasum": ""
             },
             "require": {
@@ -4818,20 +4930,20 @@
                 "constructor",
                 "instantiate"
             ],
-            "time": "2019-03-17T17:37:11+00:00"
+            "time": "2019-10-21T16:45:58+00:00"
         },
         {
             "name": "facade/flare-client-php",
-            "version": "1.0.4",
+            "version": "1.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/facade/flare-client-php.git",
-                "reference": "7128b251b48f24ef64e5cddd7f8d40cc3a06fd3e"
+                "reference": "04c0bbd1881942f59e27877bac3b29ba57519666"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/facade/flare-client-php/zipball/7128b251b48f24ef64e5cddd7f8d40cc3a06fd3e",
-                "reference": "7128b251b48f24ef64e5cddd7f8d40cc3a06fd3e",
+                "url": "https://api.github.com/repos/facade/flare-client-php/zipball/04c0bbd1881942f59e27877bac3b29ba57519666",
+                "reference": "04c0bbd1881942f59e27877bac3b29ba57519666",
                 "shasum": ""
             },
             "require": {
@@ -4843,7 +4955,7 @@
             },
             "require-dev": {
                 "larapack/dd": "^1.1",
-                "phpunit/phpunit": "^7.0",
+                "phpunit/phpunit": "^7.5.16",
                 "spatie/phpunit-snapshot-assertions": "^2.0"
             },
             "type": "library",
@@ -4872,26 +4984,26 @@
                 "flare",
                 "reporting"
             ],
-            "time": "2019-09-11T14:19:56+00:00"
+            "time": "2019-11-08T11:11:17+00:00"
         },
         {
             "name": "facade/ignition",
-            "version": "1.6.5",
+            "version": "1.12.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/facade/ignition.git",
-                "reference": "97244f6d511332f3574acab8242c09ddcfda892b"
+                "reference": "67736a01597b9e08f00a1fc8966b92b918dba5ea"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/facade/ignition/zipball/97244f6d511332f3574acab8242c09ddcfda892b",
-                "reference": "97244f6d511332f3574acab8242c09ddcfda892b",
+                "url": "https://api.github.com/repos/facade/ignition/zipball/67736a01597b9e08f00a1fc8966b92b918dba5ea",
+                "reference": "67736a01597b9e08f00a1fc8966b92b918dba5ea",
                 "shasum": ""
             },
             "require": {
                 "ext-json": "*",
                 "ext-mbstring": "*",
-                "facade/flare-client-php": "^1.0.4",
+                "facade/flare-client-php": "^1.1",
                 "facade/ignition-contracts": "^1.0",
                 "filp/whoops": "^2.4",
                 "illuminate/support": "~5.5.0 || ~5.6.0 || ~5.7.0 || ~5.8.0 || ^6.0",
@@ -4926,7 +5038,10 @@
             "autoload": {
                 "psr-4": {
                     "Facade\\Ignition\\": "src"
-                }
+                },
+                "files": [
+                    "src/helpers.php"
+                ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
@@ -4940,7 +5055,7 @@
                 "laravel",
                 "page"
             ],
-            "time": "2019-09-13T13:38:04+00:00"
+            "time": "2019-11-14T10:51:35+00:00"
         },
         {
             "name": "facade/ignition-contracts",
@@ -5049,16 +5164,16 @@
         },
         {
             "name": "fzaninotto/faker",
-            "version": "v1.8.0",
+            "version": "v1.9.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/fzaninotto/Faker.git",
-                "reference": "f72816b43e74063c8b10357394b6bba8cb1c10de"
+                "reference": "27a216cbe72327b2d6369fab721a5843be71e57d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/fzaninotto/Faker/zipball/f72816b43e74063c8b10357394b6bba8cb1c10de",
-                "reference": "f72816b43e74063c8b10357394b6bba8cb1c10de",
+                "url": "https://api.github.com/repos/fzaninotto/Faker/zipball/27a216cbe72327b2d6369fab721a5843be71e57d",
+                "reference": "27a216cbe72327b2d6369fab721a5843be71e57d",
                 "shasum": ""
             },
             "require": {
@@ -5067,13 +5182,11 @@
             "require-dev": {
                 "ext-intl": "*",
                 "phpunit/phpunit": "^4.8.35 || ^5.7",
-                "squizlabs/php_codesniffer": "^1.5"
+                "squizlabs/php_codesniffer": "^2.9.2"
             },
             "type": "library",
             "extra": {
-                "branch-alias": {
-                    "dev-master": "1.8-dev"
-                }
+                "branch-alias": []
             },
             "autoload": {
                 "psr-4": {
@@ -5095,7 +5208,7 @@
                 "faker",
                 "fixtures"
             ],
-            "time": "2018-07-12T10:23:15+00:00"
+            "time": "2019-11-14T13:13:06+00:00"
         },
         {
             "name": "hamcrest/hamcrest-php",
@@ -5235,23 +5348,23 @@
         },
         {
             "name": "justinrainbow/json-schema",
-            "version": "5.2.8",
+            "version": "5.2.9",
             "source": {
                 "type": "git",
                 "url": "https://github.com/justinrainbow/json-schema.git",
-                "reference": "dcb6e1006bb5fd1e392b4daa68932880f37550d4"
+                "reference": "44c6787311242a979fa15c704327c20e7221a0e4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/justinrainbow/json-schema/zipball/dcb6e1006bb5fd1e392b4daa68932880f37550d4",
-                "reference": "dcb6e1006bb5fd1e392b4daa68932880f37550d4",
+                "url": "https://api.github.com/repos/justinrainbow/json-schema/zipball/44c6787311242a979fa15c704327c20e7221a0e4",
+                "reference": "44c6787311242a979fa15c704327c20e7221a0e4",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.3"
             },
             "require-dev": {
-                "friendsofphp/php-cs-fixer": "~2.2.20",
+                "friendsofphp/php-cs-fixer": "~2.2.20||~2.15.1",
                 "json-schema/json-schema-test-suite": "1.2.0",
                 "phpunit/phpunit": "^4.8.35"
             },
@@ -5297,7 +5410,7 @@
                 "json",
                 "schema"
             ],
-            "time": "2019-01-14T23:55:14+00:00"
+            "time": "2019-09-25T14:49:45+00:00"
         },
         {
             "name": "laravel/browser-kit-testing",
@@ -5362,25 +5475,25 @@
         },
         {
             "name": "maximebf/debugbar",
-            "version": "v1.15.0",
+            "version": "v1.15.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/maximebf/php-debugbar.git",
-                "reference": "30e7d60937ee5f1320975ca9bc7bcdd44d500f07"
+                "reference": "6c4277f6117e4864966c9cb58fb835cee8c74a1e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/maximebf/php-debugbar/zipball/30e7d60937ee5f1320975ca9bc7bcdd44d500f07",
-                "reference": "30e7d60937ee5f1320975ca9bc7bcdd44d500f07",
+                "url": "https://api.github.com/repos/maximebf/php-debugbar/zipball/6c4277f6117e4864966c9cb58fb835cee8c74a1e",
+                "reference": "6c4277f6117e4864966c9cb58fb835cee8c74a1e",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.0",
+                "php": ">=5.6",
                 "psr/log": "^1.0",
-                "symfony/var-dumper": "^2.6|^3.0|^4.0"
+                "symfony/var-dumper": "^2.6|^3|^4"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.0|^5.0"
+                "phpunit/phpunit": "^5"
             },
             "suggest": {
                 "kriswallsmith/assetic": "The best way to manage assets",
@@ -5390,7 +5503,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.14-dev"
+                    "dev-master": "1.15-dev"
                 }
             },
             "autoload": {
@@ -5419,20 +5532,20 @@
                 "debug",
                 "debugbar"
             ],
-            "time": "2017-12-15T11:13:46+00:00"
+            "time": "2019-09-24T14:55:42+00:00"
         },
         {
             "name": "mockery/mockery",
-            "version": "1.2.3",
+            "version": "1.2.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/mockery/mockery.git",
-                "reference": "4eff936d83eb809bde2c57a3cea0ee9643769031"
+                "reference": "b3453f75fd23d9fd41685f2148f4abeacabc6405"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/mockery/mockery/zipball/4eff936d83eb809bde2c57a3cea0ee9643769031",
-                "reference": "4eff936d83eb809bde2c57a3cea0ee9643769031",
+                "url": "https://api.github.com/repos/mockery/mockery/zipball/b3453f75fd23d9fd41685f2148f4abeacabc6405",
+                "reference": "b3453f75fd23d9fd41685f2148f4abeacabc6405",
                 "shasum": ""
             },
             "require": {
@@ -5446,7 +5559,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "1.2.x-dev"
                 }
             },
             "autoload": {
@@ -5484,7 +5597,7 @@
                 "test double",
                 "testing"
             ],
-            "time": "2019-08-07T15:01:07+00:00"
+            "time": "2019-09-30T08:30:27+00:00"
         },
         {
             "name": "myclabs/deep-copy",
@@ -5901,22 +6014,22 @@
         },
         {
             "name": "phpspec/prophecy",
-            "version": "1.8.1",
+            "version": "1.9.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpspec/prophecy.git",
-                "reference": "1927e75f4ed19131ec9bcc3b002e07fb1173ee76"
+                "reference": "f6811d96d97bdf400077a0cc100ae56aa32b9203"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/1927e75f4ed19131ec9bcc3b002e07fb1173ee76",
-                "reference": "1927e75f4ed19131ec9bcc3b002e07fb1173ee76",
+                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/f6811d96d97bdf400077a0cc100ae56aa32b9203",
+                "reference": "f6811d96d97bdf400077a0cc100ae56aa32b9203",
                 "shasum": ""
             },
             "require": {
                 "doctrine/instantiator": "^1.0.2",
                 "php": "^5.3|^7.0",
-                "phpdocumentor/reflection-docblock": "^2.0|^3.0.2|^4.0",
+                "phpdocumentor/reflection-docblock": "^2.0|^3.0.2|^4.0|^5.0",
                 "sebastian/comparator": "^1.1|^2.0|^3.0",
                 "sebastian/recursion-context": "^1.0|^2.0|^3.0"
             },
@@ -5960,20 +6073,20 @@
                 "spy",
                 "stub"
             ],
-            "time": "2019-06-13T12:50:23+00:00"
+            "time": "2019-10-03T11:07:50+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "7.0.7",
+            "version": "7.0.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "7743bbcfff2a907e9ee4a25be13d0f8ec5e73800"
+                "reference": "aa0d179a13284c7420fc281fc32750e6cc7c9e2f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/7743bbcfff2a907e9ee4a25be13d0f8ec5e73800",
-                "reference": "7743bbcfff2a907e9ee4a25be13d0f8ec5e73800",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/aa0d179a13284c7420fc281fc32750e6cc7c9e2f",
+                "reference": "aa0d179a13284c7420fc281fc32750e6cc7c9e2f",
                 "shasum": ""
             },
             "require": {
@@ -5982,7 +6095,7 @@
                 "php": "^7.2",
                 "phpunit/php-file-iterator": "^2.0.2",
                 "phpunit/php-text-template": "^1.2.1",
-                "phpunit/php-token-stream": "^3.1.0",
+                "phpunit/php-token-stream": "^3.1.1",
                 "sebastian/code-unit-reverse-lookup": "^1.0.1",
                 "sebastian/environment": "^4.2.2",
                 "sebastian/version": "^2.0.1",
@@ -6023,7 +6136,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2019-07-25T05:31:54+00:00"
+            "time": "2019-09-17T06:24:36+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -6167,16 +6280,16 @@
         },
         {
             "name": "phpunit/php-token-stream",
-            "version": "3.1.0",
+            "version": "3.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-token-stream.git",
-                "reference": "e899757bb3df5ff6e95089132f32cd59aac2220a"
+                "reference": "995192df77f63a59e47f025390d2d1fdf8f425ff"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-token-stream/zipball/e899757bb3df5ff6e95089132f32cd59aac2220a",
-                "reference": "e899757bb3df5ff6e95089132f32cd59aac2220a",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-token-stream/zipball/995192df77f63a59e47f025390d2d1fdf8f425ff",
+                "reference": "995192df77f63a59e47f025390d2d1fdf8f425ff",
                 "shasum": ""
             },
             "require": {
@@ -6212,20 +6325,20 @@
             "keywords": [
                 "tokenizer"
             ],
-            "time": "2019-07-25T05:29:42+00:00"
+            "time": "2019-09-17T06:23:10+00:00"
         },
         {
             "name": "phpunit/phpunit",
-            "version": "8.3.5",
+            "version": "8.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "302faed7059fde575cf3403a78c730c5e3a62750"
+                "reference": "67f9e35bffc0dd52d55d565ddbe4230454fd6a4e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/302faed7059fde575cf3403a78c730c5e3a62750",
-                "reference": "302faed7059fde575cf3403a78c730c5e3a62750",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/67f9e35bffc0dd52d55d565ddbe4230454fd6a4e",
+                "reference": "67f9e35bffc0dd52d55d565ddbe4230454fd6a4e",
                 "shasum": ""
             },
             "require": {
@@ -6269,7 +6382,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "8.3-dev"
+                    "dev-master": "8.4-dev"
                 }
             },
             "autoload": {
@@ -6295,7 +6408,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2019-09-14T09:12:03+00:00"
+            "time": "2019-11-06T09:42:23+00:00"
         },
         {
             "name": "scrivo/highlight.php",
@@ -7020,16 +7133,16 @@
         },
         {
             "name": "seld/jsonlint",
-            "version": "1.7.1",
+            "version": "1.7.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Seldaek/jsonlint.git",
-                "reference": "d15f59a67ff805a44c50ea0516d2341740f81a38"
+                "reference": "e2e5d290e4d2a4f0eb449f510071392e00e10d19"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Seldaek/jsonlint/zipball/d15f59a67ff805a44c50ea0516d2341740f81a38",
-                "reference": "d15f59a67ff805a44c50ea0516d2341740f81a38",
+                "url": "https://api.github.com/repos/Seldaek/jsonlint/zipball/e2e5d290e4d2a4f0eb449f510071392e00e10d19",
+                "reference": "e2e5d290e4d2a4f0eb449f510071392e00e10d19",
                 "shasum": ""
             },
             "require": {
@@ -7065,7 +7178,7 @@
                 "parser",
                 "validator"
             ],
-            "time": "2018-01-24T12:46:19+00:00"
+            "time": "2019-10-24T14:27:39+00:00"
         },
         {
             "name": "seld/phar-utils",
@@ -7113,16 +7226,16 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "3.4.2",
+            "version": "3.5.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "b8a7362af1cc1aadb5bd36c3defc4dda2cf5f0a8"
+                "reference": "65b12cdeaaa6cd276d4c3033a95b9b88b12701e7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/b8a7362af1cc1aadb5bd36c3defc4dda2cf5f0a8",
-                "reference": "b8a7362af1cc1aadb5bd36c3defc4dda2cf5f0a8",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/65b12cdeaaa6cd276d4c3033a95b9b88b12701e7",
+                "reference": "65b12cdeaaa6cd276d4c3033a95b9b88b12701e7",
                 "shasum": ""
             },
             "require": {
@@ -7160,20 +7273,20 @@
                 "phpcs",
                 "standards"
             ],
-            "time": "2019-04-10T23:49:02+00:00"
+            "time": "2019-10-28T04:36:32+00:00"
         },
         {
             "name": "symfony/dom-crawler",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/dom-crawler.git",
-                "reference": "cc686552948d627528c0e2e759186dff67c2610e"
+                "reference": "4b9efd5708c3a38593e19b6a33e40867f4f89d72"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/dom-crawler/zipball/cc686552948d627528c0e2e759186dff67c2610e",
-                "reference": "cc686552948d627528c0e2e759186dff67c2610e",
+                "url": "https://api.github.com/repos/symfony/dom-crawler/zipball/4b9efd5708c3a38593e19b6a33e40867f4f89d72",
+                "reference": "4b9efd5708c3a38593e19b6a33e40867f4f89d72",
                 "shasum": ""
             },
             "require": {
@@ -7221,11 +7334,11 @@
             ],
             "description": "Symfony DomCrawler Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-26T08:26:39+00:00"
+            "time": "2019-10-28T17:07:32+00:00"
         },
         {
             "name": "symfony/filesystem",
-            "version": "v4.3.4",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
diff --git a/phpunit.xml b/phpunit.xml
index 9f83e95ff..48eba5e99 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -48,5 +48,6 @@
         <server name="GOOGLE_SELECT_ACCOUNT" value=""/>
         <server name="APP_URL" value="http://bookstack.dev"/>
         <server name="DEBUGBAR_ENABLED" value="false"/>
+        <server name="SAML2_ENABLED" value="false"/>
     </php>
 </phpunit>
diff --git a/readme.md b/readme.md
index ca90be305..f86e661ea 100644
--- a/readme.md
+++ b/readme.md
@@ -174,4 +174,5 @@ These are the great open-source projects used to help build BookStack:
     * [Laravel IDE helper](https://github.com/barryvdh/laravel-ide-helper)
 * [WKHTMLtoPDF](http://wkhtmltopdf.org/index.html)
 * [Draw.io](https://github.com/jgraph/drawio)
-* [Laravel Stats](https://github.com/stefanzweifel/laravel-stats)
\ No newline at end of file
+* [Laravel Stats](https://github.com/stefanzweifel/laravel-stats)
+* [OneLogin's SAML PHP Toolkit](https://github.com/onelogin/php-saml)
\ No newline at end of file
diff --git a/resources/icons/saml2.svg b/resources/icons/saml2.svg
new file mode 100644
index 000000000..a9a2994a7
--- /dev/null
+++ b/resources/icons/saml2.svg
@@ -0,0 +1,4 @@
+<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
+    <path d="M0 0h24v24H0z" fill="none"/>
+    <path d="M12.65 10C11.83 7.67 9.61 6 7 6c-3.31 0-6 2.69-6 6s2.69 6 6 6c2.61 0 4.83-1.67 5.65-4H17v4h4v-4h2v-4H12.65zM7 14c-1.1 0-2-.9-2-2s.9-2 2-2 2 .9 2 2-.9 2-2 2z"/>
+</svg>
\ No newline at end of file
diff --git a/resources/lang/de/errors.php b/resources/lang/de/errors.php
index ccec60561..ff2bf8653 100644
--- a/resources/lang/de/errors.php
+++ b/resources/lang/de/errors.php
@@ -17,6 +17,8 @@ return [
     'ldap_fail_authed' => 'LDAP-Zugriff mit DN und Passwort ist fehlgeschlagen',
     'ldap_extension_not_installed' => 'LDAP-PHP-Erweiterung ist nicht installiert.',
     'ldap_cannot_connect' => 'Die Verbindung zum LDAP-Server ist fehlgeschlagen. Beim initialen Verbindungsaufbau trat ein Fehler auf.',
+    'saml_already_logged_in' => 'Sie sind bereits angemeldet',
+    'saml_user_not_registered' => 'Kein Benutzer mit ID :name registriert und die automatische Registrierung ist deaktiviert',
     'social_no_action_defined' => 'Es ist keine Aktion definiert',
     'social_login_bad_response' => "Fehler bei der :socialAccount-Anmeldung: \n:error",
     'social_account_in_use' => 'Dieses :socialAccount-Konto wird bereits verwendet. Bitte melden Sie sich mit dem :socialAccount-Konto an.',
diff --git a/resources/lang/de_informal/errors.php b/resources/lang/de_informal/errors.php
index 9b5b5166b..e62350156 100644
--- a/resources/lang/de_informal/errors.php
+++ b/resources/lang/de_informal/errors.php
@@ -9,16 +9,11 @@ return [
     'permissionJson' => 'Du hast keine Berechtigung, die angeforderte Aktion auszuführen.',
 
     // Auth
+    'saml_already_logged_in' => 'Du bist bereits angemeldet',
     'error_user_exists_different_creds' => 'Ein Benutzer mit der E-Mail-Adresse :email ist bereits mit anderen Anmeldedaten registriert.',
     'email_already_confirmed' => 'Die E-Mail-Adresse ist bereits bestätigt. Bitte melde dich an.',
     'email_confirmation_invalid' => 'Der Bestätigungslink ist nicht gültig oder wurde bereits verwendet. Bitte registriere dich erneut.',
-    'email_confirmation_expired' => 'Der Bestätigungslink ist abgelaufen. Es wurde eine neue Bestätigungs-E-Mail gesendet.',
-    'ldap_fail_anonymous' => 'Anonymer LDAP-Zugriff ist fehlgeschlafgen',
-    'ldap_fail_authed' => 'LDAP-Zugriff mit DN und Passwort ist fehlgeschlagen',
-    'ldap_extension_not_installed' => 'LDAP-PHP-Erweiterung ist nicht installiert.',
-    'ldap_cannot_connect' => 'Die Verbindung zum LDAP-Server ist fehlgeschlagen. Beim initialen Verbindungsaufbau trat ein Fehler auf.',
-    'social_no_action_defined' => 'Es ist keine Aktion definiert',
-    'social_login_bad_response' => "Fehler bei der :socialAccount-Anmeldung: \n:error",
+
     'social_account_in_use' => 'Dieses :socialAccount-Konto wird bereits verwendet. Bitte melde dich mit dem :socialAccount-Konto an.',
     'social_account_email_in_use' => 'Die E-Mail-Adresse ":email" ist bereits registriert. Wenn Du bereits registriert bist, kannst Du Dein :socialAccount-Konto in Deinen Profil-Einstellungen verknüpfen.',
     'social_account_existing' => 'Dieses :socialAccount-Konto ist bereits mit Ihrem Profil verknüpft.',
diff --git a/resources/lang/en/errors.php b/resources/lang/en/errors.php
index c3b47744d..a7c591c5d 100644
--- a/resources/lang/en/errors.php
+++ b/resources/lang/en/errors.php
@@ -17,6 +17,12 @@ return [
     'ldap_fail_authed' => 'LDAP access failed using given dn & password details',
     'ldap_extension_not_installed' => 'LDAP PHP extension not installed',
     'ldap_cannot_connect' => 'Cannot connect to ldap server, Initial connection failed',
+    'saml_already_logged_in' => 'Already logged in',
+    'saml_user_not_registered' => 'The user :name is not registered and automatic registration is disabled',
+    'saml_no_email_address' => 'Could not find an email address, for this user, in the data provided by the external authentication system',
+    'saml_invalid_response_id' => 'The request from the external authentication system is not recognised by a process started by this application. Navigating back after a login could cause this issue.',
+    'saml_fail_authed' => 'Login using :system failed, system did not provide successful authorization',
+    'saml_email_exists' => 'Registration unsuccessful since a user already exists with email address ":email"',
     'social_no_action_defined' => 'No action defined',
     'social_login_bad_response' => "Error received during :socialAccount login: \n:error",
     'social_account_in_use' => 'This :socialAccount account is already in use, Try logging in via the :socialAccount option.',
diff --git a/resources/views/auth/login.blade.php b/resources/views/auth/login.blade.php
index fbf540d71..836150d69 100644
--- a/resources/views/auth/login.blade.php
+++ b/resources/views/auth/login.blade.php
@@ -45,6 +45,16 @@
                 @endforeach
             @endif
 
+            @if($samlEnabled)
+                <hr class="my-l">
+                <div>
+                    <a id="saml-login" class="button outline block svg" href="{{ url("/saml2/login") }}">
+                       @icon('saml2')
+                      {{ trans('auth.log_in_with', ['socialDriver' => config('saml2.name')]) }}
+                    </a>
+                </div>
+            @endif
+
             @if(setting('registration-enabled', false))
                 <div class="text-center pb-s">
                     <hr class="my-l">
@@ -54,4 +64,4 @@
         </div>
     </div>
 
-@stop
\ No newline at end of file
+@stop
diff --git a/resources/views/auth/register.blade.php b/resources/views/auth/register.blade.php
index 0e996a00d..8dd6592c1 100644
--- a/resources/views/auth/register.blade.php
+++ b/resources/views/auth/register.blade.php
@@ -49,6 +49,16 @@
                     </div>
                 @endforeach
             @endif
+
+            @if($samlEnabled)
+                <hr class="my-l">
+                <div>
+                    <a id="saml-login" class="button outline block svg" href="{{ url("/saml2/login") }}">
+                        @icon('saml2')
+                        {{ trans('auth.log_in_with', ['socialDriver' => config('saml2.name')]) }}
+                    </a>
+                </div>
+            @endif
         </div>
     </div>
 @stop
diff --git a/resources/views/settings/roles/form.blade.php b/resources/views/settings/roles/form.blade.php
index 20b8d65ed..4617b1f52 100644
--- a/resources/views/settings/roles/form.blade.php
+++ b/resources/views/settings/roles/form.blade.php
@@ -19,7 +19,7 @@
                     @include('form.text', ['name' => 'description'])
                 </div>
 
-                @if(config('auth.method') === 'ldap')
+                @if(config('auth.method') === 'ldap' || config('saml2.enabled') === true)
                     <div class="form-group">
                         <label for="name">{{ trans('settings.role_external_auth_id') }}</label>
                         @include('form.text', ['name' => 'external_auth_id'])
@@ -255,4 +255,4 @@
             {{ trans('settings.role_users_none') }}
         </p>
     @endif
-</div>
\ No newline at end of file
+</div>
diff --git a/resources/views/users/form.blade.php b/resources/views/users/form.blade.php
index 32b717ec8..6eafd43bc 100644
--- a/resources/views/users/form.blade.php
+++ b/resources/views/users/form.blade.php
@@ -25,7 +25,7 @@
     </div>
 </div>
 
-@if($authMethod === 'ldap' && userCan('users-manage'))
+@if(($authMethod === 'ldap' || config('saml2.enabled') === true) && userCan('users-manage'))
     <div class="grid half gap-xl v-center">
         <div>
             <label class="setting-list-label">{{ trans('settings.users_external_auth_id') }}</label>
@@ -84,4 +84,4 @@
         </div>
 
     </div>
-@endif
\ No newline at end of file
+@endif
diff --git a/routes/web.php b/routes/web.php
index eafb6a45c..839e5a256 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -216,6 +216,13 @@ Route::post('/register/confirm/resend', 'Auth\ConfirmEmailController@resend');
 Route::get('/register/confirm/{token}', 'Auth\ConfirmEmailController@confirm');
 Route::post('/register', 'Auth\RegisterController@postRegister');
 
+// SAML routes
+Route::get('/saml2/login', 'Auth\Saml2Controller@login');
+Route::get('/saml2/logout', 'Auth\Saml2Controller@logout');
+Route::get('/saml2/metadata', 'Auth\Saml2Controller@metadata');
+Route::get('/saml2/sls', 'Auth\Saml2Controller@sls');
+Route::post('/saml2/acs', 'Auth\Saml2Controller@acs');
+
 // User invitation routes
 Route::get('/register/invite/{token}', 'Auth\UserInviteController@showSetPassword');
 Route::post('/register/invite/{token}', 'Auth\UserInviteController@setPassword');
diff --git a/tests/Auth/Saml2.php b/tests/Auth/Saml2.php
new file mode 100644
index 000000000..ef1ca8d13
--- /dev/null
+++ b/tests/Auth/Saml2.php
@@ -0,0 +1,315 @@
+<?php namespace Tests;
+
+use BookStack\Auth\Role;
+use BookStack\Auth\User;
+
+class Saml2 extends TestCase
+{
+
+    public function setUp(): void
+    {
+        parent::setUp();
+        // Set default config for SAML2
+        config()->set([
+            'saml2.name' => 'SingleSignOn-Testing',
+            'saml2.enabled' => true,
+            'saml2.auto_register' => true,
+            'saml2.email_attribute' => 'email',
+            'saml2.display_name_attributes' => ['first_name', 'last_name'],
+            'saml2.external_id_attribute' => 'uid',
+            'saml2.user_to_groups' => false,
+            'saml2.group_attribute' => 'user_groups',
+            'saml2.remove_from_groups' => false,
+            'saml2.onelogin_overrides' => null,
+            'saml2.onelogin.idp.entityId' => 'http://saml.local/saml2/idp/metadata.php',
+            'saml2.onelogin.idp.singleSignOnService.url' => 'http://saml.local/saml2/idp/SSOService.php',
+            'saml2.onelogin.idp.singleLogoutService.url' => 'http://saml.local/saml2/idp/SingleLogoutService.php',
+            'saml2.autoload_from_metadata' => false,
+            'saml2.onelogin.idp.x509cert' => $this->testCert,
+            'saml2.onelogin.debug' => false,
+        ]);
+    }
+
+    public function test_metadata_endpoint_displays_xml_as_expected()
+    {
+        $req = $this->get('/saml2/metadata');
+        $req->assertHeader('Content-Type', 'text/xml; charset=UTF-8');
+        $req->assertSee('md:EntityDescriptor');
+        $req->assertSee(url('/saml2/acs'));
+    }
+
+    public function test_onelogin_overrides_functions_as_expected()
+    {
+        $json = '{"sp": {"assertionConsumerService": {"url": "https://example.com/super-cats"}}, "contactPerson": {"technical": {"givenName": "Barry Scott", "emailAddress": "barry@example.com"}}}';
+        config()->set(['saml2.onelogin_overrides' => $json]);
+
+        $req = $this->get('/saml2/metadata');
+        $req->assertSee('https://example.com/super-cats');
+        $req->assertSee('md:ContactPerson');
+        $req->assertSee('<md:GivenName>Barry Scott</md:GivenName>');
+    }
+
+    public function test_login_option_shows_on_login_page()
+    {
+        $req = $this->get('/login');
+        $req->assertSeeText('SingleSignOn-Testing');
+        $req->assertElementExists('a[href$="/saml2/login"]');
+    }
+
+    public function test_login_option_shows_on_register_page_only_when_auto_register_enabled()
+    {
+        $this->setSettings(['app-public' => 'true', 'registration-enabled' => 'true']);
+
+        $req = $this->get('/register');
+        $req->assertSeeText('SingleSignOn-Testing');
+        $req->assertElementExists('a[href$="/saml2/login"]');
+
+        config()->set(['saml2.auto_register' => false]);
+
+        $req = $this->get('/register');
+        $req->assertDontSeeText('SingleSignOn-Testing');
+        $req->assertElementNotExists('a[href$="/saml2/login"]');
+    }
+
+    public function test_login()
+    {
+        $req = $this->get('/saml2/login');
+        $redirect = $req->headers->get('location');
+        $this->assertStringStartsWith('http://saml.local/saml2/idp/SSOService.php', $redirect, 'Login redirects to SSO location');
+
+        config()->set(['saml2.onelogin.strict' => false]);
+        $this->assertFalse($this->isAuthenticated());
+
+        $this->withPost(['SAMLResponse' => $this->acsPostData], function () {
+
+            $acsPost = $this->post('/saml2/acs');
+            $acsPost->assertRedirect('/');
+            $this->assertTrue($this->isAuthenticated());
+            $this->assertDatabaseHas('users', [
+                'email' => 'user@example.com',
+                'external_auth_id' => 'user',
+                'email_confirmed' => true,
+                'name' => 'Barry Scott'
+            ]);
+
+        });
+    }
+
+    public function test_group_role_sync_on_login()
+    {
+        config()->set([
+            'saml2.onelogin.strict' => false,
+            'saml2.user_to_groups' => true,
+            'saml2.remove_from_groups' => false,
+        ]);
+
+        $memberRole = factory(Role::class)->create(['external_auth_id' => 'member']);
+        $adminRole = Role::getSystemRole('admin');
+
+        $this->withPost(['SAMLResponse' => $this->acsPostData], function () use ($memberRole, $adminRole) {
+            $acsPost = $this->post('/saml2/acs');
+            $user = User::query()->where('external_auth_id', '=', 'user')->first();
+
+            $userRoleIds = $user->roles()->pluck('id');
+            $this->assertContains($memberRole->id, $userRoleIds, 'User was assigned to member role');
+            $this->assertContains($adminRole->id, $userRoleIds, 'User was assigned to admin role');
+        });
+    }
+
+    public function test_group_role_sync_removal_option_works_as_expected()
+    {
+        config()->set([
+            'saml2.onelogin.strict' => false,
+            'saml2.user_to_groups' => true,
+            'saml2.remove_from_groups' => true,
+        ]);
+
+        $this->withPost(['SAMLResponse' => $this->acsPostData], function () {
+            $acsPost = $this->post('/saml2/acs');
+            $user = User::query()->where('external_auth_id', '=', 'user')->first();
+
+            $randomRole = factory(Role::class)->create(['external_auth_id' => 'random']);
+            $user->attachRole($randomRole);
+            $this->assertContains($randomRole->id, $user->roles()->pluck('id'));
+
+            auth()->logout();
+            $acsPost = $this->post('/saml2/acs');
+            $this->assertNotContains($randomRole->id, $user->roles()->pluck('id'));
+        });
+    }
+
+    public function test_logout_redirects_to_saml_logout_when_active_saml_session()
+    {
+        config()->set([
+            'saml2.onelogin.strict' => false,
+        ]);
+
+        $this->withPost(['SAMLResponse' => $this->acsPostData], function () {
+            $acsPost = $this->post('/saml2/acs');
+            $lastLoginType = session()->get('last_login_type');
+            $this->assertEquals('saml2', $lastLoginType);
+
+            $req = $this->get('/logout');
+            $req->assertRedirect('/saml2/logout');
+        });
+    }
+
+    public function test_logout_sls_flow()
+    {
+        config()->set([
+            'saml2.onelogin.strict' => false,
+        ]);
+
+        $handleLogoutResponse = function () {
+            $this->assertTrue($this->isAuthenticated());
+
+            $req = $this->get('/saml2/sls');
+            $req->assertRedirect('/');
+            $this->assertFalse($this->isAuthenticated());
+        };
+
+        $loginAndStartLogout = function () use ($handleLogoutResponse) {
+            $this->post('/saml2/acs');
+
+            $req = $this->get('/saml2/logout');
+            $redirect = $req->headers->get('location');
+            $this->assertStringStartsWith('http://saml.local/saml2/idp/SingleLogoutService.php', $redirect);
+            $this->withGet(['SAMLResponse' => $this->sloResponseData], $handleLogoutResponse);
+        };
+
+        $this->withPost(['SAMLResponse' => $this->acsPostData], $loginAndStartLogout);
+    }
+
+    public function test_logout_sls_flow_when_sls_not_configured()
+    {
+        config()->set([
+            'saml2.onelogin.strict' => false,
+            'saml2.onelogin.idp.singleLogoutService.url' => null,
+        ]);
+
+        $loginAndStartLogout = function () {
+            $this->post('/saml2/acs');
+
+            $req = $this->get('/saml2/logout');
+            $req->assertRedirect('/');
+            $this->assertFalse($this->isAuthenticated());
+        };
+
+        $this->withPost(['SAMLResponse' => $this->acsPostData], $loginAndStartLogout);
+    }
+
+    public function test_dump_user_details_option_works()
+    {
+        config()->set([
+            'saml2.onelogin.strict' => false,
+            'saml2.dump_user_details' => true,
+        ]);
+
+        $this->withPost(['SAMLResponse' => $this->acsPostData], function () {
+            $acsPost = $this->post('/saml2/acs');
+            $acsPost->assertJsonStructure([
+                'id_from_idp',
+                'attrs_from_idp' => [],
+                'attrs_after_parsing' => [],
+            ]);
+        });
+    }
+
+    public function test_user_registration_with_existing_email()
+    {
+        config()->set([
+            'saml2.onelogin.strict' => false,
+        ]);
+
+        $viewer = $this->getViewer();
+        $viewer->email = 'user@example.com';
+        $viewer->save();
+
+        $this->withPost(['SAMLResponse' => $this->acsPostData], function () {
+            $acsPost = $this->post('/saml2/acs');
+            $acsPost->assertRedirect('/');
+            $errorMessage = session()->get('error');
+            $this->assertEquals('Registration unsuccessful since a user already exists with email address "user@example.com"', $errorMessage);
+        });
+    }
+
+    public function test_saml_routes_are_only_active_if_saml_enabled()
+    {
+        config()->set(['saml2.enabled' => false]);
+        $getRoutes = ['/login', '/logout', '/metadata', '/sls'];
+        foreach ($getRoutes as $route) {
+            $req = $this->get('/saml2' . $route);
+            $req->assertRedirect('/');
+            $error = session()->get('error');
+            $this->assertStringStartsWith('You do not have permission to access', $error);
+            session()->flush();
+        }
+
+        $postRoutes = ['/acs'];
+        foreach ($postRoutes as $route) {
+            $req = $this->post('/saml2' . $route);
+            $req->assertRedirect('/');
+            $error = session()->get('error');
+            $this->assertStringStartsWith('You do not have permission to access', $error);
+            session()->flush();
+        }
+    }
+
+    protected function withGet(array $options, callable $callback)
+    {
+        return $this->withGlobal($_GET, $options, $callback);
+    }
+
+    protected function withPost(array $options, callable $callback)
+    {
+        return $this->withGlobal($_POST, $options, $callback);
+    }
+
+    protected function withGlobal(array &$global, array $options, callable $callback)
+    {
+        $original = [];
+        foreach ($options as $key => $val) {
+            $original[$key] = $global[$key] ?? null;
+            $global[$key] = $val;
+        }
+
+        $callback();
+
+        foreach ($options as $key => $val) {
+            $val = $original[$key];
+            if ($val) {
+                $global[$key] = $val;
+            } else {
+                unset($global[$key]);
+            }
+        }
+    }
+
+    /**
+     * The post data for a callback for single-sign-in.
+     * Provides the following attributes:
+     * array:5 [
+        "uid" => array:1 [
+            0 => "user"
+        ]
+        "first_name" => array:1 [
+            0 => "Barry"
+        ]
+        "last_name" => array:1 [
+            0 => "Scott"
+        ]
+        "email" => array:1 [
+            0 => "user@example.com"
+        ]
+        "user_groups" => array:2 [
+            0 => "member"
+            1 => "admin"
+        ]
+    ]
+     */
+    protected $acsPostData = '<samlp:Response xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" ID="_4dd4564dc794061ef1baa0467d79028ced3ce54bee" Version="2.0" IssueInstant="2019-11-17T17:53:39Z" Destination="http://bookstack.local/saml2/acs" InResponseTo="ONELOGIN_6a0f4f3993040f1987fd37068b5296229ad5361c"><saml:Issuer>http://saml.local/saml2/idp/metadata.php</saml:Issuer><ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
  <ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
    <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
  <ds:Reference URI="#_4dd4564dc794061ef1baa0467d79028ced3ce54bee"><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/><ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/><ds:DigestValue>vmh/S75Nf+g+ecDJCzAbZWKJVlug7BfsC+9aWNeIreQ=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>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</ds:SignatureValue>
<ds:KeyInfo><ds:X509Data><ds:X509Certificate>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</ds:X509Certificate></ds:X509Data></ds:KeyInfo></ds:Signature><samlp:Status><samlp:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success"/></samlp:Status><saml:Assertion xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xs="http://www.w3.org/2001/XMLSchema" ID="_6842df9c659f13fe5196cd9ef6c2f028364ae943b1" Version="2.0" IssueInstant="2019-11-17T17:53:39Z"><saml:Issuer>http://saml.local/saml2/idp/metadata.php</saml:Issuer><ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
  <ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
    <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
  <ds:Reference URI="#_6842df9c659f13fe5196cd9ef6c2f028364ae943b1"><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/><ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/><ds:DigestValue>krb5w6S8toXc/eSwZPUOBvQzn3os4JACuxxrJkxpgFw=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>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</ds:SignatureValue>
<ds:KeyInfo><ds:X509Data><ds:X509Certificate>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</ds:X509Certificate></ds:X509Data></ds:KeyInfo></ds:Signature><saml:Subject><saml:NameID SPNameQualifier="http://bookstack.local/saml2/metadata" Format="urn:oasis:names:tc:SAML:2.0:nameid-format:transient">_2c7ab86eb8f1d1063443f219cc5868ff66708912e3</saml:NameID><saml:SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer"><saml:SubjectConfirmationData NotOnOrAfter="2019-11-17T17:58:39Z" Recipient="http://bookstack.local/saml2/acs" InResponseTo="ONELOGIN_6a0f4f3993040f1987fd37068b5296229ad5361c"/></saml:SubjectConfirmation></saml:Subject><saml:Conditions NotBefore="2019-11-17T17:53:09Z" NotOnOrAfter="2019-11-17T17:58:39Z"><saml:AudienceRestriction><saml:Audience>http://bookstack.local/saml2/metadata</saml:Audience></saml:AudienceRestriction></saml:Conditions><saml:AuthnStatement AuthnInstant="2019-11-17T17:53:39Z" SessionNotOnOrAfter="2019-11-18T01:53:39Z" SessionIndex="_4fe7c0d1572d64b27f930aa6f236a6f42e930901cc"><saml:AuthnContext><saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:Password</saml:AuthnContextClassRef></saml:AuthnContext></saml:AuthnStatement><saml:AttributeStatement><saml:Attribute Name="uid" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"><saml:AttributeValue xsi:type="xs:string">user</saml:AttributeValue></saml:Attribute><saml:Attribute Name="first_name" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"><saml:AttributeValue xsi:type="xs:string">Barry</saml:AttributeValue></saml:Attribute><saml:Attribute Name="last_name" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"><saml:AttributeValue xsi:type="xs:string">Scott</saml:AttributeValue></saml:Attribute><saml:Attribute Name="email" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"><saml:AttributeValue xsi:type="xs:string">user@example.com</saml:AttributeValue></saml:Attribute><saml:Attribute Name="user_groups" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"><saml:AttributeValue xsi:type="xs:string">member</saml:AttributeValue><saml:AttributeValue xsi:type="xs:string">admin</saml:AttributeValue></saml:Attribute></saml:AttributeStatement></saml:Assertion></samlp:Response>';
+
+    protected $sloResponseData = 'fZHRa8IwEMb/lZJ3bdJa04a2MOYYglOY4sNe5JKms9gmpZfC/vxF3ZjC8OXgLvl938ddjtC1vVjZTzu6d429NaiDr641KC5PBRkHIyxgg8JAp1E4JbZPbysRTanoB+ussi25QR4TgKgH11hDguWiIIeawTxOaK1iPYt5XcczHUlJeVRlMklBJjOuM1qDVCTY6wE9WRAv5HHEUS8NOjDOjyjLJoxNGN+xVESpSNgHCRYaXWPAXaijc70IQ2ntyUPqNG2tgjY8Z45CbNFLmt8V7GxBNuuX1eZ1uT7EcZJKAE4TJhXPaMxlVlFffPKKJnXE5ryusoiU+VlMXJIN5Y/feXRn1VR92GkHFTiY9sc+D2+p/HqRrQM34n33bCsd7KEd9eMd4+W32I5KaUQSlleHP9Hwv6uX3w==';
+
+    protected $testCert = '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';
+}