diff --git a/index.html b/index.html
index 79e3025..aa34d32 100644
--- a/index.html
+++ b/index.html
@@ -5,14 +5,16 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>Safebox installer</title>
 <style>
-body, html {
+html, body {
     margin: 0;
     padding: 0;
     height: 100%;
+    overflow: hidden;
 }
 iframe {
-    width: 100%;
-    height: 100%;
+    display: block;
+    width: 100vw;
+    height: 100vh;
     border: none;
 }
 </style>