diff --git a/scaffold/Model_hs.cg b/scaffold/Model_hs.cg
index 4fa4dec6..d97260a5 100644
--- a/scaffold/Model_hs.cg
+++ b/scaffold/Model_hs.cg
@@ -11,12 +11,12 @@ import Database.Persist.GenericSql (mkMigrate)
 share2 mkPersist (mkMigrate "migrateAll") [~qq~persist|
 User
     ident String
-    password String null update
+    password String Maybe Update
     UniqueUser ident
 Email
     email String
-    user UserId null update
-    verkey String null update
+    user UserId Maybe Update
+    verkey String Maybe Update
     UniqueEmail email
 |]
 
diff --git a/scaffold/cabal.cg b/scaffold/cabal.cg
index 63e2f5b2..715ca99b 100644
--- a/scaffold/cabal.cg
+++ b/scaffold/cabal.cg
@@ -28,7 +28,7 @@ executable         simple-server
                  , directory
                  , bytestring
                  , text
-                 , persistent
+                 , persistent   >= 0.3.1.1
                  , persistent-~lower~
                  , template-haskell
                  , hamlet