diff --git a/docs/index.html b/docs/index.html
index 0e147e8a..c2ebbfaf 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -7,6 +7,10 @@
   <meta name="description" content="Description">
   <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0">
   <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify@4/lib/themes/vue.css">
+  <!-- CDN files for docsify-katex -->
+  <script src="//cdn.jsdelivr.net/npm/docsify-katex@latest/dist/docsify-katex.js"></script>
+  <!-- or <script src="//cdn.jsdelivr.net/gh/upupming/docsify-katex@latest/dist/docsify-katex.js"></script> -->
+  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/katex@latest/dist/katex.min.css"/>
 </head>
 <body>
   <div id="app"></div>
