diff --git a/src/serviceworker/mod.ts b/src/serviceworker/mod.ts
index 81c7652..2e78d54 100644
--- a/src/serviceworker/mod.ts
+++ b/src/serviceworker/mod.ts
@@ -69,6 +69,7 @@ if (IS_SW) {
 	})
 
 	self.addEventListener('push', (event) => {
+		console.log('push')
 		const { title, options } = (event.data?.json() ?? {}) as {
 			title?: string
 			options?: Partial<NotificationOptions>
@@ -140,9 +141,14 @@ async function fetchHandler(event: FetchEvent) {
 async function updateCache() {
 	const serverVersion = await getServerCacheVersion()
 	const clientVersion = await swStorage.getItem<string>('$sw.cache.version')
+	if (clientVersion === null) return
 	if (serverVersion === undefined) return
 	if (clientVersion === serverVersion) return
-	openCache()
+
+	// Open new pre-cache
+	await openCache()
+	// Delete old pre-cache
+	caches.delete(clientVersion)
 }
 
 async function getServerCacheVersion() {