diff --git a/index.html b/index.html
index 5789027..ef313c5 100644
--- a/index.html
+++ b/index.html
@@ -4,6 +4,7 @@
 		<meta charset="utf-8">
 		<title>gamja IRC client</title>
 		<link rel="stylesheet" href="./style.css">
+		<meta name="viewport" content="width=device-width, initial-scale=1">
 	</head>
 	<body>
 		<noscript>
