diff --git a/public/iframeSample.html b/public/iframeSample.html
index 5ed08985..a03b5687 100644
--- a/public/iframeSample.html
+++ b/public/iframeSample.html
@@ -11,6 +11,6 @@
     iframe { height: 99%; }
   </style>
   <body>
-    <iframe src='http://localhost:3000?iframe=true'></iframe>
+    <iframe src='/?iframe=true'></iframe>
   </body>
 </html>
