diff --git a/frontend/index.html b/frontend/index.html
index a07717c..67fb382 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -2,6 +2,7 @@
 <html lang="zh-Hant">
   <head>
     <meta charset="UTF-8" />
+    <script src="https://harbor-1wk.pages.dev/embed/maintenance.js" data-project="ai-agent-tutorial"></script>
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta name="theme-color" content="#f6f4ef" />
     <title>AI-Agent-Tutorial | 新手學習台</title>