diff --git a/lib/4nk/MessageBus.ts b/lib/4nk/MessageBus.ts
index 1198f00..cee397e 100644
--- a/lib/4nk/MessageBus.ts
+++ b/lib/4nk/MessageBus.ts
@@ -576,8 +576,11 @@ export default class MessageBus {
       console.error('[MessageBus] sendMessage: iframe not found');
       return;
     }
-    console.log('[MessageBus] sendMessage:', message);
-    iframe.contentWindow?.postMessage(message, this.origin);
+  
+    const targetOrigin = "*" // this.origin pour la production ;
+  
+    console.log('[MessageBus] sendMessage:', message, 'to', targetOrigin);
+    iframe.contentWindow?.postMessage(message, targetOrigin);
   }
 
   private initMessageListener(correlationId: string): void {