diff --git a/views/templates/index.erb b/views/templates/index.erb
index a2654594..d16d514d 100644
--- a/views/templates/index.erb
+++ b/views/templates/index.erb
@@ -2,6 +2,7 @@
 <html>
   <head>
     <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>The web site of <%= username %></title>
     <!-- The style.css file allows you to change the look of your web pages.
          If you include the next line in all your web pages, they will all share the same look.
diff --git a/views/templates/not_found.erb b/views/templates/not_found.erb
index 2ed111e2..5c94fe23 100644
--- a/views/templates/not_found.erb
+++ b/views/templates/not_found.erb
@@ -2,6 +2,7 @@
 <html>
   <head>
     <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Not Found</title>
     <link href="/style.css" rel="stylesheet" type="text/css" media="all">
   </head>
@@ -9,4 +10,4 @@
     <h1>Page Not Found</h1>
     <p>The requested page was not found.</p>
   </body>
-</html>
\ No newline at end of file
+</html>
