diff --git a/docs/index.html b/docs/index.html
index 0a41b516c..f27f17c5d 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -21,13 +21,27 @@
       rel="stylesheet"
       href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.9.0/css/all.min.css"
     />
-    <script src="//cdn.jsdelivr.net/npm/mermaid@9.1.7/dist/mermaid.min.js"></script>
+    <script src="//cdn.jsdelivr.net/npm/mermaid@9.1.6/dist/mermaid.min.js"></script>
     <!-- <script src="http://localhost:9000/mermaid.js"></script> -->
     <script
       defer=""
       data-domain="mermaid-js.github.io"
       src="https://plausible.io/js/plausible.js"
     ></script>
+    <script>
+      // prettier-ignore
+      (function (i, s, o, g, r, a, m) {
+      i['GoogleAnalyticsObject'] = r; i[r] = i[r] || function () {
+        (i[r].q = i[r].q || []).push(arguments)
+      }, i[r].l = 1 * new Date(); a = s.createElement(o),
+        m = s.getElementsByTagName(o)[0]; a.async = 1; a.src = g; m.parentNode.insertBefore(a, m)
+    })(window, document, 'script', 'https://www.google-analytics.com/analytics.js', 'ga');
+
+      ga('create', 'UA-153180559-1', 'auto');
+      if (location) {
+        ga('send', 'pageview', location.hash);
+      }
+    </script>
     <script>
       var require = {
         paths: { vs: 'https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.29.1/min/vs' },