diff --git a/first/templates/base.html b/first/templates/base.html
index 39422a5..44a32e8 100644
--- a/first/templates/base.html
+++ b/first/templates/base.html
@@ -1,8 +1,8 @@
 <!DOCTYPE HTML>
 <html>
     <head>
-        <link rel="stylesheet" href="{{ url_for('static', filename = 'bootstrap/css/bootstrap.min.css') }}"></link>
-        <script src="{{ url_for('static', filename = 'bootstrap/js/bootstrap.min.js') }}"></script>
+        <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-wEmeIV1mKuiNpC+IOBjI7aAzPcEZeedi5yW5f2yOq55WWLwNGmvvx4Um1vskeMj0" crossorigin="anonymous">
+        <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-p34f1UUtsS3wqzfto5wAAmdvj+osOnFyQFpp4Ua3gs/ZVWx6oOypYoCJhGGScy+8" crossorigin="anonymous"></script>
         <title> Juni Kim </title>
     </head>
     <body>
