diff --git a/index.html b/index.html
index f779acd..8b51466 100644
--- a/index.html
+++ b/index.html
@@ -75,7 +75,7 @@
     <body>
         <div class="gm4html5_div_class" id="gm4html5_div_id">
         <img src="html5game/splash.png" id="GM4HTML5_loadingscreen" alt="GameMaker:HTML5 loading screen" style="width: 100%; height: 100%; display: none;"/>
-            <canvas id="canvas" width="853" height="480">
+            <canvas id="canvas" width="100%" height="300px">
                      <p>Your browser doesn't support HTML5 canvas.</p>
             </canvas>
         </div>
