diff --git a/src/index.html b/src/index.html
index 77d7147a..72085153 100644
--- a/src/index.html
+++ b/src/index.html
@@ -4,7 +4,7 @@
     <meta charset="utf-8">
     <title>Squoosh</title>
     <meta name="description" content="Compress and compare images with different codecs, right in your browser">
-    <meta name="viewport" content="width=device-width,initial-scale=1">
+    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
     <meta name="mobile-web-app-capable" content="yes">
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="theme-color" content="#673ab8">