diff --git a/index.html b/index.html
index ba0281ba55b979f15d61227e293cbc47d3f9e242..0b855572739508c08bb2f75ad2fb96804e02df35 100644
--- a/index.html
+++ b/index.html
@@ -14,7 +14,7 @@
 		}
 	</style>
 	<body>
-		<input id="text" name="text" placeholder="QR code content">
+		<input id="text" name="text" placeholder="QR code content" style="width: 100%;">
 		<div id="qrcode"></div>
 	</body>
 	<script type="text/javascript" src="js/jquery.min.js"></script>