diff --git a/config/models b/config/models
index 282f6b5..ef05986 100644
--- a/config/models
+++ b/config/models
@@ -218,10 +218,12 @@ Project
     collabUser RoleId        Maybe
     collabAnon RoleId        Maybe
     inbox      InboxId
+    outbox     OutboxId
     followers  FollowerSetId
 
     UniqueProject ident sharer
     UniqueProjectInbox inbox
+    UniqueProjectOutbox outbox
     UniqueProjectFollowers followers
 
 Repo
diff --git a/migrations/2019_06_16.model b/migrations/2019_06_16.model
new file mode 100644
index 0000000..f53659e
--- /dev/null
+++ b/migrations/2019_06_16.model
@@ -0,0 +1,19 @@
+Outbox
+
+Project
+    ident      PrjIdent
+    sharer     Int64
+    name       Text          Maybe
+    desc       Text          Maybe
+    workflow   Int64
+    nextTicket Int
+    wiki       Int64         Maybe
+    collabUser Int64         Maybe
+    collabAnon Int64         Maybe
+    inbox      Int64
+    outbox     OutboxId
+    followers  Int64
+
+    UniqueProject ident sharer
+    UniqueProjectInbox inbox
+    UniqueProjectFollowers followers
diff --git a/src/Vervis/Form/Project.hs b/src/Vervis/Form/Project.hs
index 190a68d..38f1aec 100644
--- a/src/Vervis/Form/Project.hs
+++ b/src/Vervis/Form/Project.hs
@@ -123,6 +123,7 @@ editProjectAForm sid (Entity jid project) = Project
     <*> aopt selectRole "User role"  (Just $ projectCollabUser project)
     <*> aopt selectRole "Guest role" (Just $ projectCollabAnon project)
     <*> pure                         (projectInbox project)
+    <*> pure                         (projectOutbox project)
     <*> pure                         (projectFollowers project)
     where
     selectWiki =
diff --git a/src/Vervis/Handler/Project.hs b/src/Vervis/Handler/Project.hs
index e5eadde..87aa7a9 100644
--- a/src/Vervis/Handler/Project.hs
+++ b/src/Vervis/Handler/Project.hs
@@ -87,6 +87,7 @@ postProjectsR shr = do
             pid <- requireAuthId
             runDB $ do
                 ibid <- insert Inbox
+                obid <- insert Outbox
                 fsid <- insert FollowerSet
                 let project = Project
                         { projectIdent      = npIdent np
@@ -99,6 +100,7 @@ postProjectsR shr = do
                         , projectCollabAnon = Nothing
                         , projectCollabUser = Nothing
                         , projectInbox      = ibid
+                        , projectOutbox     = obid
                         , projectFollowers  = fsid
                         }
                 jid <- insert project
diff --git a/src/Vervis/Migration.hs b/src/Vervis/Migration.hs
index c38ae97..0e4a090 100644
--- a/src/Vervis/Migration.hs
+++ b/src/Vervis/Migration.hs
@@ -821,6 +821,20 @@ changes hLocal ctx =
         "Outbox"
       -- 120
     , removeField "OutboxItem" "person"
+      -- 121
+    , addFieldRefRequired'
+        "Project"
+        Outbox20190616
+        (Just $ do
+            jids <- selectKeysList ([] :: [Filter Project20190616]) []
+            for_ jids $ \ jid -> do
+                obid <- insert Outbox20190616
+                update jid [Project20190616Outbox =. obid]
+        )
+        "outbox"
+        "Outbox"
+      -- 122
+    , addUnique "Project" $ Unique "UniqueProjectOutbox" ["outbox"]
     ]
 
 migrateDB
diff --git a/src/Vervis/Migration/Model.hs b/src/Vervis/Migration/Model.hs
index 266fa76..6c2cf3e 100644
--- a/src/Vervis/Migration/Model.hs
+++ b/src/Vervis/Migration/Model.hs
@@ -96,6 +96,9 @@ module Vervis.Migration.Model
     , Outbox20190615Generic (..)
     , OutboxItem20190615Generic (..)
     , OutboxItem20190615
+    , Project20190616Generic (..)
+    , Project20190616
+    , Outbox20190616Generic (..)
     )
 where
 
@@ -207,3 +210,6 @@ makeEntitiesMigration "20190612"
 
 makeEntitiesMigration "20190615"
     $(modelFile "migrations/2019_06_15.model")
+
+makeEntitiesMigration "20190616"
+    $(modelFile "migrations/2019_06_16.model")