diff --git a/html/webapp/index.html b/html/webapp/index.html
index b73a94f..9adae5a 100644
--- a/html/webapp/index.html
+++ b/html/webapp/index.html
@@ -1,9 +1,9 @@
-<!doctype html>
+<!DOCTYPE html>
 <html>
 <head>
   <title>AGILE - An HTML5 implementation of Sierra On-Line's AGI interpreter</title>
   <meta http-equiv="content-type" content="text/html; charset=UTF-8">
-  <meta id="gameViewport" name="viewport" content="width=device-width, initial-scale=1.0, interactive-widget=resizes-content">
+  <meta id="gameViewport" name="viewport" content="width=device-width initial-scale=1.0 interactive-widget=resizes-content">
   <meta name="theme-color" content="#000000">
   <link href="styles.css" rel="stylesheet" type="text/css">
 </head>
