diff --git a/docusaurus.config.js b/docusaurus.config.js
index 0c3e419..6406547 100644
--- a/docusaurus.config.js
+++ b/docusaurus.config.js
@@ -283,10 +283,6 @@ var _hmt = _hmt || [];
       src: "/js/clarity.js",
       async: true,
     },
-    {
-      src: "https://tcdn.casibase.org/casibase.js",
-      async: true,
-    },
     {
       src: "/js/casibase.js",
       async: true,
diff --git a/static/js/casibase.js b/static/js/casibase.js
index e0de4ae..bd55edd 100644
--- a/static/js/casibase.js
+++ b/static/js/casibase.js
@@ -1,5 +1,16 @@
-/* eslint-disable no-undef */
-initCasibaseChat({
-  endpoint: "https://ai.casbin.com",
-  themeColor: "rgb(64,59,121)",
-});
+(function(w, d, s, c, i) {
+  const j = d.createElement(s);
+  j.async = false;
+  j.src = "https://tcdn.casibase.org/casibase.js";
+  j.onload = function() {
+    w[c]("init", {
+      endpoint: "https://ai.casbin.com",
+      themeColor: "rgb(64,59,121)",
+    });
+  };
+  const f = d.getElementsByTagName(s)[0];
+  f.parentNode.insertBefore(j, f);
+  w[c] = w[c] || function() {
+    (w[c].q = w[c].q || []).push(arguments);
+  };
+})(window, document, "script", "casibaseChat");