diff --git a/src/Database/Console/MigrateCommand.php b/src/Database/Console/MigrateCommand.php
index a15373286..11c0126ec 100644
--- a/src/Database/Console/MigrateCommand.php
+++ b/src/Database/Console/MigrateCommand.php
@@ -80,7 +80,7 @@ class MigrateCommand extends AbstractCommand
         $this->info('Publishing assets...');
 
         $this->app->make('files')->copyDirectory(
-            $this->app->basePath().'/vendor/components/font-awesome/webfonts',
+            $this->app->vendorPath().'/components/font-awesome/webfonts',
             $this->app->publicPath().'/assets/fonts'
         );
     }
diff --git a/src/Extension/ExtensionManager.php b/src/Extension/ExtensionManager.php
index cb72b718b..6682612d1 100644
--- a/src/Extension/ExtensionManager.php
+++ b/src/Extension/ExtensionManager.php
@@ -67,11 +67,11 @@ class ExtensionManager
      */
     public function getExtensions()
     {
-        if (is_null($this->extensions) && $this->filesystem->exists($this->app->basePath().'/vendor/composer/installed.json')) {
+        if (is_null($this->extensions) && $this->filesystem->exists($this->app->vendorPath().'/composer/installed.json')) {
             $extensions = new Collection();
 
             // Load all packages installed by composer.
-            $installed = json_decode($this->filesystem->get($this->app->basePath().'/vendor/composer/installed.json'), true);
+            $installed = json_decode($this->filesystem->get($this->app->vendorPath().'/composer/installed.json'), true);
 
             foreach ($installed as $package) {
                 if (Arr::get($package, 'type') != 'flarum-extension' || empty(Arr::get($package, 'name'))) {
@@ -326,6 +326,6 @@ class ExtensionManager
      */
     protected function getExtensionsDir()
     {
-        return $this->app->basePath().'/vendor';
+        return $this->app->vendorPath();
     }
 }
diff --git a/src/Foundation/Application.php b/src/Foundation/Application.php
index ccba98c97..ae550e4c1 100644
--- a/src/Foundation/Application.php
+++ b/src/Foundation/Application.php
@@ -41,6 +41,20 @@ class Application extends Container implements ApplicationContract
      */
     protected $publicPath;
 
+    /**
+     * The custom storage path defined by the developer.
+     *
+     * @var string
+     */
+    protected $storagePath;
+
+    /**
+     * A custom vendor path to find dependencies in non-standard environments.
+     *
+     * @var string
+     */
+    protected $vendorPath;
+
     /**
      * Indicates if the application has "booted".
      *
@@ -83,13 +97,6 @@ class Application extends Container implements ApplicationContract
      */
     protected $deferredServices = [];
 
-    /**
-     * The custom storage path defined by the developer.
-     *
-     * @var string
-     */
-    protected $storagePath;
-
     /**
      * Create a new Flarum application instance.
      *
@@ -226,7 +233,7 @@ class Application extends Container implements ApplicationContract
      */
     protected function bindPathsInContainer()
     {
-        foreach (['base', 'public', 'storage'] as $path) {
+        foreach (['base', 'public', 'storage', 'vendor'] as $path) {
             $this->instance('path.'.$path, $this->{$path.'Path'}());
         }
     }
@@ -261,6 +268,16 @@ class Application extends Container implements ApplicationContract
         return $this->storagePath ?: $this->basePath.DIRECTORY_SEPARATOR.'storage';
     }
 
+    /**
+     * Get the path to the vendor directory where dependencies are installed.
+     *
+     * @return string
+     */
+    public function vendorPath()
+    {
+        return $this->vendorPath ?: $this->basePath.DIRECTORY_SEPARATOR.'vendor';
+    }
+
     /**
      * Set the storage directory.
      *
@@ -276,6 +293,21 @@ class Application extends Container implements ApplicationContract
         return $this;
     }
 
+    /**
+     * Set the vendor directory.
+     *
+     * @param string $path
+     * @return $this
+     */
+    public function useVendorPath($path)
+    {
+        $this->vendorPath = $path;
+
+        $this->instance('path.vendor', $path);
+
+        return $this;
+    }
+
     /**
      * Get or check the current application environment.
      *
diff --git a/src/Foundation/InstalledSite.php b/src/Foundation/InstalledSite.php
index b7262ce41..614cb1119 100644
--- a/src/Foundation/InstalledSite.php
+++ b/src/Foundation/InstalledSite.php
@@ -100,6 +100,10 @@ class InstalledSite implements SiteInterface
 
         $laravel->useStoragePath($this->paths['storage']);
 
+        if (isset($this->paths['vendor'])) {
+            $laravel->useVendorPath($this->paths['vendor']);
+        }
+
         $laravel->instance('env', 'production');
         $laravel->instance('flarum.config', $this->config);
         $laravel->instance('config', $config = $this->getIlluminateConfig($laravel));
diff --git a/src/Foundation/UninstalledSite.php b/src/Foundation/UninstalledSite.php
index d8dd0bc95..d363959b2 100644
--- a/src/Foundation/UninstalledSite.php
+++ b/src/Foundation/UninstalledSite.php
@@ -59,6 +59,10 @@ class UninstalledSite implements SiteInterface
 
         $laravel->useStoragePath($this->paths['storage']);
 
+        if (isset($this->paths['vendor'])) {
+            $laravel->useVendorPath($this->paths['vendor']);
+        }
+
         $laravel->instance('env', 'production');
         $laravel->instance('flarum.config', []);
         $laravel->instance('config', $config = $this->getIlluminateConfig());
diff --git a/src/Frontend/FrontendServiceProvider.php b/src/Frontend/FrontendServiceProvider.php
index efae2c933..f09399513 100644
--- a/src/Frontend/FrontendServiceProvider.php
+++ b/src/Frontend/FrontendServiceProvider.php
@@ -30,7 +30,7 @@ class FrontendServiceProvider extends AbstractServiceProvider
                 );
 
                 $assets->setLessImportDirs([
-                    $this->app->basePath().'/vendor/components/font-awesome/less' => ''
+                    $this->app->vendorPath().'/components/font-awesome/less' => ''
                 ]);
 
                 $assets->css([$this, 'addBaseCss']);
diff --git a/src/Install/InstallServiceProvider.php b/src/Install/InstallServiceProvider.php
index 1ea4fa07b..d32955232 100644
--- a/src/Install/InstallServiceProvider.php
+++ b/src/Install/InstallServiceProvider.php
@@ -30,7 +30,8 @@ class InstallServiceProvider extends AbstractServiceProvider
             return new Installation(
                 $this->app->basePath(),
                 $this->app->publicPath(),
-                $this->app->storagePath()
+                $this->app->storagePath(),
+                $this->app->vendorPath(),
             );
         });
     }
diff --git a/src/Install/Installation.php b/src/Install/Installation.php
index 074d5d135..8c66fbbe2 100644
--- a/src/Install/Installation.php
+++ b/src/Install/Installation.php
@@ -16,6 +16,7 @@ class Installation
     private $basePath;
     private $publicPath;
     private $storagePath;
+    private $vendorPath;
 
     private $configPath;
     private $debug = false;
@@ -35,11 +36,12 @@ class Installation
     /** @var \Illuminate\Database\ConnectionInterface */
     private $db;
 
-    public function __construct($basePath, $publicPath, $storagePath)
+    public function __construct($basePath, $publicPath, $storagePath, $vendorPath)
     {
         $this->basePath = $basePath;
         $this->publicPath = $publicPath;
         $this->storagePath = $storagePath;
+        $this->vendorPath = $vendorPath;
     }
 
     public function configPath($path)
@@ -137,11 +139,11 @@ class Installation
         });
 
         $pipeline->pipe(function () {
-            return new Steps\PublishAssets($this->basePath, $this->getAssetPath());
+            return new Steps\PublishAssets($this->vendorPath, $this->getAssetPath());
         });
 
         $pipeline->pipe(function () {
-            return new Steps\EnableBundledExtensions($this->db, $this->basePath, $this->getAssetPath());
+            return new Steps\EnableBundledExtensions($this->db, $this->vendorPath, $this->getAssetPath());
         });
 
         return $pipeline;
diff --git a/src/Install/Steps/EnableBundledExtensions.php b/src/Install/Steps/EnableBundledExtensions.php
index b887339e5..e58280b31 100644
--- a/src/Install/Steps/EnableBundledExtensions.php
+++ b/src/Install/Steps/EnableBundledExtensions.php
@@ -32,17 +32,17 @@ class EnableBundledExtensions implements Step
     /**
      * @var string
      */
-    private $basePath;
+    private $vendorPath;
 
     /**
      * @var string
      */
     private $assetPath;
 
-    public function __construct(ConnectionInterface $database, $basePath, $assetPath)
+    public function __construct(ConnectionInterface $database, $vendorPath, $assetPath)
     {
         $this->database = $database;
-        $this->basePath = $basePath;
+        $this->vendorPath = $vendorPath;
         $this->assetPath = $assetPath;
     }
 
@@ -90,7 +90,7 @@ class EnableBundledExtensions implements Step
      */
     private function loadExtensions()
     {
-        $json = file_get_contents("$this->basePath/vendor/composer/installed.json");
+        $json = file_get_contents("$this->vendorPath/composer/installed.json");
 
         return (new Collection(json_decode($json, true)))
             ->filter(function ($package) {
@@ -98,7 +98,7 @@ class EnableBundledExtensions implements Step
             })->filter(function ($package) {
                 return ! empty(Arr::get($package, 'name'));
             })->map(function ($package) {
-                $extension = new Extension($this->basePath.'/vendor/'.Arr::get($package, 'name'), $package);
+                $extension = new Extension($this->vendorPath.'/'.Arr::get($package, 'name'), $package);
                 $extension->setVersion(Arr::get($package, 'version'));
 
                 return $extension;
diff --git a/src/Install/Steps/PublishAssets.php b/src/Install/Steps/PublishAssets.php
index b8f20868b..61d0164f9 100644
--- a/src/Install/Steps/PublishAssets.php
+++ b/src/Install/Steps/PublishAssets.php
@@ -20,16 +20,16 @@ class PublishAssets implements Step, ReversibleStep
     /**
      * @var string
      */
-    private $basePath;
+    private $vendorPath;
 
     /**
      * @var string
      */
     private $assetPath;
 
-    public function __construct($basePath, $assetPath)
+    public function __construct($vendorPath, $assetPath)
     {
-        $this->basePath = $basePath;
+        $this->vendorPath = $vendorPath;
         $this->assetPath = $assetPath;
     }
 
@@ -41,7 +41,7 @@ class PublishAssets implements Step, ReversibleStep
     public function run()
     {
         (new Filesystem)->copyDirectory(
-            "$this->basePath/vendor/components/font-awesome/webfonts",
+            "$this->vendorPath/components/font-awesome/webfonts",
             $this->targetPath()
         );
     }