diff --git a/app/static/sw.js b/app/static/sw.js
index e06015d..184a43d 100644
--- a/app/static/sw.js
+++ b/app/static/sw.js
@@ -16,6 +16,9 @@ self.addEventListener('activate', e => {
 self.addEventListener('fetch', e => {
   const url = new URL(e.request.url);
 
+  // Only handle http/https requests
+  if (url.protocol !== 'http:' && url.protocol !== 'https:') return;
+
   // Pass through API calls
   if (url.pathname === '/extract-audio') return;