diff --git a/Controller.php b/Controller.php
index 6f3b504..49f37e3 100644
--- a/Controller.php
+++ b/Controller.php
@@ -40,7 +40,7 @@ use phpOMS\Views\View;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class Controller extends ModuleAbstract implements WebInterface
+final class Controller extends ModuleAbstract implements WebInterface
 {
 
     /**
diff --git a/Models/NullBadge.php b/Models/NullBadge.php
index fa0658b..100d408 100644
--- a/Models/NullBadge.php
+++ b/Models/NullBadge.php
@@ -22,6 +22,6 @@ namespace Modules\News\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class NullBadge extends Badge
+final class NullBadge extends Badge
 {
 }
diff --git a/Models/NullNewsArticle.php b/Models/NullNewsArticle.php
index e4204af..6a04115 100644
--- a/Models/NullNewsArticle.php
+++ b/Models/NullNewsArticle.php
@@ -22,6 +22,6 @@ namespace Modules\News\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class NullNewsArticle extends NewsArticle
+final class NullNewsArticle extends NewsArticle
 {
 }