diff --git a/install.html b/install.html
index 738b4d7..80af767 100644
--- a/install.html
+++ b/install.html
@@ -15,7 +15,7 @@
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="meta/main.css" />
    <link rel="icon" type="image/x-icon" href="favicon.ico" />
-   <style>img {width:100%} button {margin-left: 2px;margin-right: 2px;margin-bottom: 4px;margin-top: 5px;cursor: pointer;} .r {outline: 2px solid #9A9A9A} div#start button {width:100%}</style>
+   <style>img {width:100%} button {margin-left: 2px;margin-right: 2px;margin-bottom: 4px;margin-top: 5px;cursor: pointer;} .r {outline: 2px solid #9A9A9A} div#start button {width:60%}</style>
 </head>
 <body>
 <div id="bgmplayer">
