diff --git a/source/index.html b/source/index.html
index 2f55141..1308163 100644
--- a/source/index.html
+++ b/source/index.html
@@ -2,6 +2,7 @@
 <html>
 	<head>
 		<meta charset="utf-8"/>
+		<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
 		<link rel="stylesheet" type="text/css" href="style.css"/>
 		<script type="text/javascript" src="logic.js">
 		</script>
