diff --git a/src/index.js b/src/index.js
index 5a6785bc80fa..0bb347bae9f8 100644
--- a/src/index.js
+++ b/src/index.js
@@ -57,7 +57,7 @@ export class PostmsgTransport {
       }
       return iframe.contentWindow;
     }
-    return window.top;
+    return window.parent;
   }
 
   _handleEvent(e) {