diff --git a/framework/core/src/Install/Actions/InstallAction.php b/framework/core/src/Install/Actions/InstallAction.php
index 0c0169a76..982dcc3fe 100644
--- a/framework/core/src/Install/Actions/InstallAction.php
+++ b/framework/core/src/Install/Actions/InstallAction.php
@@ -72,7 +72,7 @@ class InstallAction extends Action
         $baseUrl = rtrim((string) $request->getAttribute('originalUri'), '/');
 
         $data->setSetting('admin_url', $baseUrl . '/admin');
-        $data->setSetting('api_url', $baseUrl . '/api');
+        $data->setSetting('api_url', $baseUrl . '/api.php');
         $data->setSetting('base_url', $baseUrl);
         $data->setSetting('forum_title', array_get($input, 'forumTitle'));
         $data->setSetting('mail_from', 'noreply@' . preg_replace('/^www\./i', '', parse_url($baseUrl, PHP_URL_HOST)));
diff --git a/framework/core/src/Install/Console/DataFromUser.php b/framework/core/src/Install/Console/DataFromUser.php
index 51ab38cf3..d9d149f2d 100644
--- a/framework/core/src/Install/Console/DataFromUser.php
+++ b/framework/core/src/Install/Console/DataFromUser.php
@@ -63,7 +63,7 @@ class DataFromUser implements ProvidesData
             'allow_post_editing' => 'reply',
             'allow_renaming' => '10',
             'allow_sign_up' => '1',
-            'api_url' => $baseUrl . '/api',
+            'api_url' => $baseUrl . '/api.php',
             'base_url' => $baseUrl,
             'custom_less' => '',
             'default_locale' => 'en',
diff --git a/framework/core/src/Install/Console/DefaultData.php b/framework/core/src/Install/Console/DefaultData.php
index c1708cf68..eb0a9ae1a 100644
--- a/framework/core/src/Install/Console/DefaultData.php
+++ b/framework/core/src/Install/Console/DefaultData.php
@@ -32,7 +32,7 @@ class DefaultData implements ProvidesData
         'allow_post_editing' => 'reply',
         'allow_renaming' => '10',
         'allow_sign_up' => '1',
-        'api_url' => 'http://flarum.dev/api',
+        'api_url' => 'http://flarum.dev/api.php',
         'base_url' => 'http://flarum.dev',
         'custom_less' => '',
         'default_locale' => 'en',