diff --git a/docker/rootfs/var/www/html/index.html b/docker/rootfs/var/www/html/index.html
index 8478b47f1..703db883d 100644
--- a/docker/rootfs/var/www/html/index.html
+++ b/docker/rootfs/var/www/html/index.html
@@ -5,7 +5,7 @@
         <meta http-equiv="X-UA-Compatible" content="IE=edge">
         <meta name="viewport" content="width=device-width, initial-scale=1">
         <title>Default Site</title>
-        <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
+        <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet">
         <style>
             .jumbotron { margin-top: 50px; }
         </style>