diff --git a/web/index.html b/web/index.html
index 0b1c64a..7181c59 100644
--- a/web/index.html
+++ b/web/index.html
@@ -5,7 +5,7 @@
     <link rel="icon" type="image/png" href="/crab.png" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>nes.rs</title>
-    <script src="coi-serviceworker.min.js"></script>
+    <script type="module" src="coi-serviceworker.min.js"></script>
     <link rel="preconnect" href="https://fonts.googleapis.com" />
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
     <link