diff --git a/specification/activitypub.md b/specification/activitypub.md
index 0196fa190..0aae7c50b 100644
--- a/specification/activitypub.md
+++ b/specification/activitypub.md
@@ -471,7 +471,6 @@ A timestamp for when this actor was last changed. This can be used by followers
                 "publicKeyPem": "-----BEGIN PUBLIC KEY-----\n"
                                 "..."
                                 "-----END PUBLIC KEY-----\n"},
-  "summary": "Just another ActivityPub account",
   "type": "Person"
 }
 ```