diff --git a/vercel.json b/vercel.json
index b227136caf191a15fd7ab5e21d5363f00a7b0b8e..dafbbb93f851df8b980cd05d01e31bdc060b2787 100644
--- a/vercel.json
+++ b/vercel.json
@@ -61,6 +61,10 @@
       "destination": "/api/activitypub/sendNote.js"
     }
   ],
+  "functions": {
+    "/api/activitypub/sendNote.js": {
+      "maxDuration": 300
+    },
   "headers": [
     {
       "source": "/(.*).ajson",