diff --git a/index.html b/index.html
index 7b0579a..9cc8343 100644
--- a/index.html
+++ b/index.html
@@ -46,7 +46,7 @@
       ]
     }
   </script>
-  <script src="//unpkg.com/docsify/lib/docsify.min.js"></script>
+  <script src="https://unpkg.com/docsify@4.9.4/lib/docsify.min.js"></script>
   <script src="//unpkg.com/docsify/lib/plugins/search.min.js"></script>
 </body>
 </html>