diff --git a/frontend/public/service-worker.js b/frontend/public/service-worker.js
index 86ea725..6887f86 100644
--- a/frontend/public/service-worker.js
+++ b/frontend/public/service-worker.js
@@ -1,10 +1,10 @@
-const CACHE_NAME = 'erp-shell-v2';
+const CACHE_NAME = 'erp-shell-v3';
 const API_CACHE_NAME = 'erp-api-v1';
 const WRITE_QUEUE_DB_NAME = 'erp-write-queue-db';
 const WRITE_QUEUE_STORE = 'requests';
 const WRITE_QUEUE_SYNC_TAG = 'erp-write-queue-sync';
 const OFFLINE_URL = '/offline.html';
-const PRECACHE_URLS = ['/', '/index.html', '/manifest.webmanifest', '/pwa-icon.svg', OFFLINE_URL];
+const PRECACHE_URLS = ['/', '/manifest.webmanifest', '/pwa-icon.svg', OFFLINE_URL];
 
 const API_CACHE_BLOCKLIST = [
   '/api/token/',
@@ -143,9 +143,27 @@ async function replayQueuedRequests() {
 }
 
 self.addEventListener('install', (event) => {
-  event.waitUntil(
-    caches.open(CACHE_NAME).then((cache) => cache.addAll(PRECACHE_URLS))
+self.addEventListener('install', (event) => {
+async function precacheShell() {
+  const cache = await caches.open(CACHE_NAME);
+  await Promise.all(
+    PRECACHE_URLS.map(async (url) => {
+      try {
+        const response = await fetch(url, { cache: 'reload' });
+        if (!response || !response.ok) {
+          console.warn('Skipping precache for non-OK response:', url, response && response.status);
+          return;
+        }
+        await cache.put(url, response);
+      } catch (error) {
+        console.warn('Skipping precache for failed request:', url, error);
+      }
+    })
   );
+}
+
+self.addEventListener('install', (event) => {
+  event.waitUntil(precacheShell());
   self.skipWaiting();
 });