diff --git a/html/index.html b/html/index.html
index 2ba5af8..5df6de2 100644
--- a/html/index.html
+++ b/html/index.html
@@ -7,7 +7,7 @@
         ></script>
         <script type="module">
           import {renderToCanvas} from './js/mobile-automata.mjs'
-          renderToCanvas(document.getElementById('automataCanvas'), canvas.innerWidth, canvas.innerHeight);
+          renderToCanvas(document.getElementById('automataCanvas'), Math.floor(canvas.innerWidth), Math.floor(canvas.innerHeight));
         </script>
 
         <meta charset="UTF-8" />