diff --git a/public/iframe.html b/public/iframe.html
index 84a47ce..5d59e66 100644
--- a/public/iframe.html
+++ b/public/iframe.html
@@ -9,6 +9,6 @@
     </style>
 </head>
 <body>
-    <iframe src="./01_index.html" width=1366 height=1024 />
+    <iframe src="./01_index" width=1366 height=1024 />
 </body>
 </html>
\ No newline at end of file
