diff --git a/public/assets/chat/index.html b/public/assets/chat/index.html
index 2b93e8735..a04ef6f00 100644
--- a/public/assets/chat/index.html
+++ b/public/assets/chat/index.html
@@ -2,6 +2,7 @@
 <meta charset="utf-8">
 <title>Zammad Chat</title>
 <link rel="stylesheet" href="style.css">
+<meta name="viewport" content="width=device-width">
 <script>document.write('<script src="http://' + (location.host || 'localhost').split(':')[0] + ':35729/livereload.js?snipver=1"></' + 'script>')</script>
 <style>
   body {