diff --git a/index.html b/index.html
index 1469208..ab924bf 100644
--- a/index.html
+++ b/index.html
@@ -6,6 +6,7 @@
   <title>Play</title>
   <script defer type="module" src="./script/main.js"></script>
   <meta content="width=device-width, initial-scale=1, maximum-scale=1.0, user-scalable=no" name="viewport" >
+  <link rel="icon" type="image/png" href="http://cdn.tiye.me/logo/calcit.png"/>
   <link rel="stylesheet" href="./script/main.css"/>
 </head>
 <body>
