diff --git a/Database/Persist/MongoDB.hs b/Database/Persist/MongoDB.hs
--- a/Database/Persist/MongoDB.hs
+++ b/Database/Persist/MongoDB.hs
@@ -955,7 +955,7 @@
 defaultHost :: Text
 defaultHost = "127.0.0.1"
 defaultAccessMode :: DB.AccessMode
-defaultAccessMode = DB.ConfirmWrites ["j" DB.=: True]
+defaultAccessMode = DB.ConfirmWrites ["w" DB.:= DB.Int32 1]
 defaultPoolStripes, defaultStripeConnections :: Int
 defaultPoolStripes = 1
 defaultStripeConnections = 10
diff --git a/persistent-mongoDB.cabal b/persistent-mongoDB.cabal
--- a/persistent-mongoDB.cabal
+++ b/persistent-mongoDB.cabal
@@ -1,5 +1,5 @@
 name:            persistent-mongoDB
-version:         1.4.4.3
+version:         1.4.4.4
 license:         MIT
 license-file:    LICENSE
 author:          Greg Weber <greg@gregweber.info>