diff --git a/public/service-worker.js b/public/service-worker.js
index 4ac48d421..e88aae780 100644
--- a/public/service-worker.js
+++ b/public/service-worker.js
@@ -33,6 +33,13 @@ self.addEventListener('activate', (event) => {
 
 // Fetch event - network first, fallback to cache
 self.addEventListener('fetch', (event) => {
+  // Skip caching for non-GET requests (POST, PUT, DELETE, etc.)
+  // The Cache API only supports GET requests
+  if (event.request.method !== 'GET') {
+    event.respondWith(fetch(event.request));
+    return;
+  }
+
   event.respondWith(
     fetch(event.request)
       .then((response) => {