diff --git a/Models/NullContactElement.php b/Models/NullContactElement.php
index 94cb0a3..f269628 100644
--- a/Models/NullContactElement.php
+++ b/Models/NullContactElement.php
@@ -22,6 +22,6 @@ namespace Modules\Profile\Models;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class NullContactElement extends ContactElement
+final class NullContactElement extends ContactElement
 {
 }