diff --git a/vercel.json b/vercel.json
index f5785bda8bbb638c2823763a3aeb3d752e619103..13bb06cc7de20da022bac71fc48764899dab722c 100644
--- a/vercel.json
+++ b/vercel.json
@@ -62,7 +62,7 @@
     }
   ],
   "functions": {
-    "api/activitypub/sendNote.js": {
+    "api/activitypub/sendNote": {
       "maxDuration": 300
     }
   },