diff --git a/wasm/index.html b/wasm/index.html
index ed8eec9..e810ff3 100644
--- a/wasm/index.html
+++ b/wasm/index.html
@@ -1,7 +1,11 @@
 <!doctype html>
 <html lang="en">
-
-<body style="margin: 0px;">
+<head>
+  <style>
+    html, body {margin:0;height:100%;}
+  </style>
+</head>
+<body>
   <script type="module">
     import './restart-audio-context.js'
     import init from './bevy_game.js'
