diff --git a/notus/Biblioteque_de_Class/Exception.cs b/notus/Biblioteque_de_Class/Exception.cs
index 722af20..90f37a1 100644
--- a/notus/Biblioteque_de_Class/Exception.cs
+++ b/notus/Biblioteque_de_Class/Exception.cs
@@ -1,13 +1,14 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Runtime.Serialization;
 using System.Text;
 using System.Threading.Tasks;
 
 namespace Biblioteque_de_Class
 {
     [Serializable]
-    public class NotAllowedException : Exception
+    public class NotAllowedException : Exception, ISerializable
     {
         public NotAllowedException(string message) : base(message)
         {