diff --git a/changelog.d/media-proxy-sw-cache.fix b/changelog.d/media-proxy-sw-cache.fix
new file mode 100644
index 000000000..bcdc59898
--- /dev/null
+++ b/changelog.d/media-proxy-sw-cache.fix
@@ -0,0 +1 @@
+Prevent service worker from caching media-proxy responses
diff --git a/src/sw.js b/src/sw.js
index 908e86567..f73c1460e 100644
--- a/src/sw.js
+++ b/src/sw.js
@@ -116,7 +116,9 @@ const isNotMedia = (req) => {
     return false
   }
   const url = new URL(req.url)
-  return !url.pathname.startsWith('/media/')
+  return (
+    !url.pathname.startsWith('/media/') && !url.pathname.startsWith('/proxy/')
+  )
 }
 const isAsset = (req) => {
   const url = new URL(req.url)