diff --git a/index.html b/index.html
index 97c6f85..2109812 100644
--- a/index.html
+++ b/index.html
@@ -1,9 +1,12 @@
 <!DOCTYPE html>
 <html lang="zh">
 <head>
+    <link href="https://cdn.bootcss.com/twitter-bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet">
     <title>fine</title>
 <head>
 <body>
-  <h1>fine<small>It's OK!</small></h1>
+    <h1>fine<small>It's OK!</small></h1>
+    <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
+    <script src="https://cdn.bootcss.com/twitter-bootstrap/4.2.1/js/bootstrap.min.js"></script>
 </body>
 </html>
