diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index f6f7022..881820e 100644
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -31,7 +31,7 @@ use phpOMS\Module\WebInterface;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class BackendController extends Controller
+final class BackendController extends Controller
 {
     /**
      * Create mid navigation
diff --git a/Models/Navigation.php b/Models/Navigation.php
index 520308c..99ec741 100644
--- a/Models/Navigation.php
+++ b/Models/Navigation.php
@@ -28,7 +28,7 @@ use phpOMS\DataStorage\Database\Query\Builder;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class Navigation
+final class Navigation
 {
 
     /**