diff --git a/index.html b/index.html
index ede773c2..3173a8d6 100644
--- a/index.html
+++ b/index.html
@@ -31,19 +31,19 @@
 		</script>
         <script id="service-worker" type="module">
             if('serviceWorker' in navigator) {
-                navigator.serviceWorker.register('sw.js')
-                    .then(function(registration) {
+                navigator.serviceWorker.register('sw.js').then(function(registration) {
                     console.log("Service Worker registered");
+                    function tryActivateUpdate() {
+                        if (registration.waiting && registration.active) {
+                            registration.unregister();
+                            console.log("Service Worker unregistered");
+                        }
+                    }
+                    tryActivateUpdate();
                     registration.onupdatefound = function() {
                         const newWorker = registration.installing;
-                        alert("update found!");
                         newWorker.onstatechange = function() {
-                            if (newWorker.state === "installed") {
-                                alert("new worker is now on state " + newWorker.state);
-                                // if (confirm("update installed! shall I skip waiting?")) {
-                                //     newWorker.skipWaiting();
-                                // }
-                            }
+                            tryActivateUpdate();
                         }
                     };
                 });