diff --git a/openflexure_microscope/api/templates/index_v1.html b/openflexure_microscope/api/templates/index_v1.html
index 5529cd5f..42d846a9 100644
--- a/openflexure_microscope/api/templates/index_v1.html
+++ b/openflexure_microscope/api/templates/index_v1.html
@@ -5,7 +5,7 @@
     <link rel= "stylesheet" type= "text/css" href="{{url_for('static', filename='style_v1.css')}}">
     <script type="text/javascript" src="{{url_for('static', filename='main_v1.js')}}"></script>
 
-    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimal-ui">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimal-ui, maximum-scale=1.0, user-scalable=0">
 
   </head>
   <body>
