diff --git a/service-worker/simple-service-worker/sw.js b/service-worker/simple-service-worker/sw.js
index 0d4fae58..8f347663 100644
--- a/service-worker/simple-service-worker/sw.js
+++ b/service-worker/simple-service-worker/sw.js
@@ -1,11 +1,11 @@
 const addResourcesToCache = async (resources) => {
   const cache = await caches.open('v1');
-  await cache.addAll(resources);
+  cache.addAll(resources).catch(err => console.error(err.stack ?? err));
 };
 
 const putInCache = async (request, response) => {
   const cache = await caches.open('v1');
-  await cache.put(request, response);
+  cache.put(request, response).catch(err => console.error(err.stack ?? err));
 };
 
 const cacheFirst = async ({ request, preloadResponsePromise, fallbackUrl }) => {