diff --git a/lib/4nk/MessageBus.ts b/lib/4nk/MessageBus.ts
index 4761d49..fc320e1 100644
--- a/lib/4nk/MessageBus.ts
+++ b/lib/4nk/MessageBus.ts
@@ -576,10 +576,8 @@ export default class MessageBus {
       return;
     }
   
-    const targetOrigin = "*" // this.origin pour la production ;
-  
-    console.log('[MessageBus] sendMessage:', message, 'to', targetOrigin);
-    iframe.contentWindow?.postMessage(message, targetOrigin);
+    console.log('[MessageBus] sendMessage:', message, 'to', this.origin);
+    iframe.contentWindow?.postMessage(message, this.origin);
   }
 
   private initMessageListener(correlationId: string): void {