diff --git a/config/saml2.php b/config/saml2.php
index 541f9fb..9c3a726 100644
--- a/config/saml2.php
+++ b/config/saml2.php
@@ -137,6 +137,16 @@
 
     'proxyVars' => false,
 
+    /*
+    | (Optional) Which class implements the route functions.
+    | If left blank, defaults to this lib's controller (Slides\Saml2\Http\Controllers\Saml2Controller).
+    | If you need to extend Saml2Controller (e.g. to override the `login()` function to pass
+    | a `$returnTo` argument), this value allows you to pass your own controller, and have
+    | it used in the routes definition.
+    |
+    */
+    'saml2_controller' => '',
+
     /*
     |--------------------------------------------------------------------------
     | Service Provider configuration.
diff --git a/src/Http/routes.php b/src/Http/routes.php
index 90a23b3..75cc5b7 100644
--- a/src/Http/routes.php
+++ b/src/Http/routes.php
@@ -6,28 +6,30 @@
     'prefix' => config('saml2.routesPrefix'),
     'middleware' => array_merge(['saml2.resolveTenant'], config('saml2.routesMiddleware')),
 ], function () {
+    $saml2_controller = config('saml2.saml2_controller', 'Slides\Saml2\Http\Controllers\Saml2Controller');
+
     Route::get('/{uuid}/logout', array(
         'as' => 'saml.logout',
-        'uses' => 'Slides\Saml2\Http\Controllers\Saml2Controller@logout',
+        'uses' => $saml2_controller.'@logout',
     ));
 
     Route::get('/{uuid}/login', array(
         'as' => 'saml.login',
-        'uses' => 'Slides\Saml2\Http\Controllers\Saml2Controller@login',
+        'uses' => $saml2_controller.'@login',
     ));
 
     Route::get('/{uuid}/metadata', array(
         'as' => 'saml.metadata',
-        'uses' => 'Slides\Saml2\Http\Controllers\Saml2Controller@metadata',
+        'uses' => $saml2_controller.'@metadata',
     ));
 
     Route::post('/{uuid}/acs', array(
         'as' => 'saml.acs',
-        'uses' => 'Slides\Saml2\Http\Controllers\Saml2Controller@acs',
+        'uses' => $saml2_controller.'@acs',
     ));
 
     Route::get('/{uuid}/sls', array(
         'as' => 'saml.sls',
-        'uses' => 'Slides\Saml2\Http\Controllers\Saml2Controller@sls',
+        'uses' => $saml2_controller.'@sls',
     ));
 });