diff --git a/index.html b/index.html
index 818d8b4..96cc8ca 100644
--- a/index.html
+++ b/index.html
@@ -3,9 +3,9 @@
 <head>
 	<meta chartset="utf-8" />
 	<title>REDOKU</title>
+	<meta name="viewport" content="width=device-width, initial-scale=1" />
 	<style>
 		body {
-			width: 500px;
 			margin: 0 auto;
 			text-align: center;
 		}
