diff --git a/web/dad_jokes/web/index.html b/web/dad_jokes/web/index.html
index b54ed98d8..1785ebb8b 100644
--- a/web/dad_jokes/web/index.html
+++ b/web/dad_jokes/web/index.html
@@ -2,6 +2,7 @@
 <html lang="en">
 <head>
   <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
   <title></title>
   <script defer src="main.dart.js" type="application/javascript"></script>
 </head>
