diff --git a/Models/NullDrawImage.php b/Models/NullDrawImage.php
index a57ee04..89572af 100644
--- a/Models/NullDrawImage.php
+++ b/Models/NullDrawImage.php
@@ -22,6 +22,6 @@ namespace Modules\Draw\Models;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class NullDrawImage extends DrawImage
+final class NullDrawImage extends DrawImage
 {
 }