diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index e3cf9e5..ad675be 100644
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -34,7 +34,7 @@ use phpOMS\Asset\AssetType;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class BackendController extends Controller
+final class BackendController extends Controller
 {
     /**
      * @param RequestAbstract  $request  Request
diff --git a/Models/Project.php b/Models/Project.php
index 1784f63..3c15fd0 100644
--- a/Models/Project.php
+++ b/Models/Project.php
@@ -26,7 +26,7 @@ use phpOMS\Localization\Money;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class Project
+final class Project
 {
     private $id = 0;
 
diff --git a/Models/ProjectMapper.php b/Models/ProjectMapper.php
index 219dd8d..bbad57b 100644
--- a/Models/ProjectMapper.php
+++ b/Models/ProjectMapper.php
@@ -30,7 +30,7 @@ use Modules\Media\Models\MediaMapper;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class ProjectMapper extends DataMapperAbstract
+final class ProjectMapper extends DataMapperAbstract
 {
 
     /**