diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index ddc11dd..e881274 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
 {
 
     /**
diff --git a/Models/Promotion.php b/Models/Promotion.php
index 1d4a5e2..93a29d5 100644
--- a/Models/Promotion.php
+++ b/Models/Promotion.php
@@ -26,7 +26,7 @@ use phpOMS\Localization\Money;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class Promotion
+final class Promotion
 {
     private $id = 0;
 
diff --git a/Models/PromotionMapper.php b/Models/PromotionMapper.php
index 57cb8ae..e5c374f 100644
--- a/Models/PromotionMapper.php
+++ b/Models/PromotionMapper.php
@@ -30,7 +30,7 @@ use Modules\Media\Models\MediaMapper;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class PromotionMapper extends DataMapperAbstract
+final class PromotionMapper extends DataMapperAbstract
 {
 
     /**