diff --git a/service-worker.js b/service-worker.js
index aa5e9be..3441deb 100644
--- a/service-worker.js
+++ b/service-worker.js
@@ -1,11 +1,16 @@
+const CACHE_NAME = 'instinct-app-cache';
+const urlsToCache = [
+    './',
+    './index.html',
+    './manifest.json',
+    './icon-192x192.png',
+    './icon-512x512.png',
+];
+
 self.addEventListener('install', (event) => {
     event.waitUntil(
-        caches.open('instinct-app-cache').then((cache) => {
-            return cache.addAll([
-                '/',
-                'index.html',
-                'manifest.json',
-            ]);
+        caches.open(CACHE_NAME).then((cache) => {
+            return cache.addAll(urlsToCache);
         })
     );
 });
@@ -17,3 +22,18 @@ self.addEventListener('fetch', (event) => {
         })
     );
 });
+
+self.addEventListener('activate', (event) => {
+    const cacheWhitelist = [CACHE_NAME];
+    event.waitUntil(
+        caches.keys().then((keyList) => {
+            return Promise.all(
+                keyList.map((key) => {
+                    if (!cacheWhitelist.includes(key)) {
+                        return caches.delete(key);
+                    }
+                })
+            );
+        })
+    );
+});