diff --git a/frontend/public/service-worker.js b/frontend/public/service-worker.js
index 6887f86..b0b599d 100644
--- a/frontend/public/service-worker.js
+++ b/frontend/public/service-worker.js
@@ -142,8 +142,6 @@ async function replayQueuedRequests() {
   }
 }
 
-self.addEventListener('install', (event) => {
-self.addEventListener('install', (event) => {
 async function precacheShell() {
   const cache = await caches.open(CACHE_NAME);
   await Promise.all(