diff --git a/layouts/partials/header.html b/layouts/partials/header.html
index 52ef913..5030464 100644
--- a/layouts/partials/header.html
+++ b/layouts/partials/header.html
@@ -7,12 +7,12 @@
 
 <!-- Add manifest and service worker for PWA support -->
 <link rel="manifest" href="/site.webmanifest" />
-<!-- <script> -->
-<!--   if('serviceWorker' in navigator) { -->
-<!--       navigator.serviceWorker -->
-<!--       .register('/sw.js', { scope: '/' }); -->
-<!--   } -->
-<!-- </script> -->
+<script>
+  if('serviceWorker' in navigator) {
+      navigator.serviceWorker
+      .register('/sw.js', { scope: '/' });
+  }
+</script>
 
 <!-- umami analytics -->
 <script async defer data-website-id="d79111e4-25ee-43d8-be20-5cd3a845a8cf" src="https://umami.korhonen.cc/ua9quuaW.js"></script>