diff --git a/website/themes/moderncpp/layout/layout.ejs b/website/themes/moderncpp/layout/layout.ejs
index 44f1896..442f181 100755
--- a/website/themes/moderncpp/layout/layout.ejs
+++ b/website/themes/moderncpp/layout/layout.ejs
@@ -29,7 +29,7 @@
     <!-- this needs to be loaded before guide's inline scripts -->
     <script src="https://cdn.jsdelivr.net/npm/vue"></script>
     <script>window.PAGE_TYPE = "<%- page.type %>"</script>
-
+    <script async src="//changkun.de/urlstat/client.js"></script>
   </head>
   <body class="<%- isIndex ? '' : 'docs' -%>">
     <% if (page.type == 'book-en-us') { %>
