diff --git a/src/Web/ActivityPub.hs b/src/Web/ActivityPub.hs
index bccaa18..ccc09ea 100644
--- a/src/Web/ActivityPub.hs
+++ b/src/Web/ActivityPub.hs
@@ -154,19 +154,22 @@ instance ActivityPub a => ToJSON (Doc a) where
             $  "@context" .= jsonldContext (proxy v)
             <> toSeries h v
 
-data ActorType = ActorTypePerson | ActorTypeOther Text
+data ActorType = ActorTypePerson | ActorTypeProject | ActorTypeOther Text
 
 instance FromJSON ActorType where
-    parseJSON = withText "ActorType" $ \ t ->
-        pure $ case t of
-            "Person" -> ActorTypePerson
-            _        -> ActorTypeOther t
+    parseJSON = withText "ActorType" $ pure . parse
+        where
+        parse t
+            | t == "Person"         = ActorTypePerson
+            | t == frg <> "Project" = ActorTypeProject
+            | otherwise             = ActorTypeOther t
 
 instance ToJSON ActorType where
     toJSON = error "toJSON ActorType"
     toEncoding at =
         toEncoding $ case at of
             ActorTypePerson  -> "Person"
+            ActorTypeProject -> frg <> "Project"
             ActorTypeOther t -> t
 
 {-