diff --git a/index.html b/index.html
index e7e67b1..e2f3afd 100644
--- a/index.html
+++ b/index.html
@@ -1,7 +1,8 @@
 <!DOCTYPE HTML>
 <html lang="en">
 <head>
-    <meta name="viewport" content="width=device-width, user-scalable=no">
+    <!-- The first two viewport values are required for Chrome, see: https://crbug.com/591179. -->
+    <meta name="viewport" content="width=device-width, minimum-scale=1.0, user-scalable=no">
     <meta name="description" content="Fast and simple tool to convert text to base64 and base64 to text.">
     <meta name="theme-color" content="#2196f3">
     <link rel="manifest" href="manifest.json">
