diff --git a/Controller.php b/Controller.php
index 5ac69b6..f2b9bb8 100644
--- a/Controller.php
+++ b/Controller.php
@@ -40,7 +40,7 @@ use phpOMS\Message\Http\RequestStatusCode;
  * @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/NullDrawImage.php b/Models/NullDrawImage.php
index 05b5160..7ad0792 100644
--- a/Models/NullDrawImage.php
+++ b/Models/NullDrawImage.php
@@ -22,6 +22,6 @@ namespace Modules\Draw\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-class NullDrawImage extends DrawImage
+final class NullDrawImage extends DrawImage
 {
 }