diff --git a/src/Vervis/Handler/Person.hs b/src/Vervis/Handler/Person.hs
index 721f3ae..5ec2012 100644
--- a/src/Vervis/Handler/Person.hs
+++ b/src/Vervis/Handler/Person.hs
@@ -143,6 +143,7 @@ getPerson shr sharer person = do
             , actorName       = sharerName sharer
             , actorSummary    = Nothing
             , actorInbox      = route2local $ SharerInboxR shr
+            , actorOutbox     = Just $ route2local $ OutboxR shr
             , actorPublicKeys =
                 [ Left $ route2local ActorKey1R
                 , Left $ route2local ActorKey2R
diff --git a/src/Vervis/Handler/Project.hs b/src/Vervis/Handler/Project.hs
index e9454ea..8b194a6 100644
--- a/src/Vervis/Handler/Project.hs
+++ b/src/Vervis/Handler/Project.hs
@@ -140,6 +140,7 @@ getProjectR shar proj = selectRep $ do
                 Just $ fromMaybe (prj2text proj) $ projectName project
             , actorSummary    = projectDesc project
             , actorInbox      = route2local $ ProjectInboxR shar proj
+            , actorOutbox     = Nothing
             , actorPublicKeys =
                 [ Left $ route2local ActorKey1R
                 , Left $ route2local ActorKey2R
diff --git a/src/Web/ActivityPub.hs b/src/Web/ActivityPub.hs
index 57e0a12..b88ac77 100644
--- a/src/Web/ActivityPub.hs
+++ b/src/Web/ActivityPub.hs
@@ -303,6 +303,7 @@ data Actor = Actor
     , actorName       :: Maybe Text
     , actorSummary    :: Maybe Text
     , actorInbox      :: LocalURI
+    , actorOutbox     :: Maybe LocalURI
     , actorPublicKeys :: [Either LocalURI PublicKey]
     }
 
@@ -317,6 +318,7 @@ instance ActivityPub Actor where
                 <*> o .:? "name"
                 <*> o .:? "summary"
                 <*> withHost host (f2l <$> o .: "inbox")
+                <*> withHostMaybe host (fmap f2l <$> o .:? "outbox")
                 <*> withHost host (parsePublicKeySet =<< o .: "publicKey")
         where
         withHost h a = do
@@ -324,13 +326,14 @@ instance ActivityPub Actor where
             if h == h'
                 then return v
                 else fail "URI host mismatch"
-    toSeries host (Actor id_ typ musername mname msummary inbox pkeys)
+    toSeries host (Actor id_ typ musername mname msummary inbox outbox pkeys)
         =  "id"                .=     l2f host id_
         <> "type"              .=     typ
         <> "preferredUsername" .=?    musername
         <> "name"              .=?    mname
         <> "summary"           .=?    msummary
         <> "inbox"             .=     l2f host inbox
+        <> "outbox"            .=?    (l2f host <$> outbox)
         <> "publicKey"         `pair` encodePublicKeySet host pkeys
 
 data CollectionType = CollectionTypeUnordered | CollectionTypeOrdered