diff --git a/Database/Persist/MongoDB.hs b/Database/Persist/MongoDB.hs
--- a/Database/Persist/MongoDB.hs
+++ b/Database/Persist/MongoDB.hs
@@ -8,6 +8,11 @@
 -- There are functions available to make working with the raw driver
 -- easier: they are under the Entity conversion section.
 -- You should still use the same connection pool that you are using for Persistent. 
+--
+-- MongoDB is a schema-less database.
+-- The MongoDB Persistent backend does not help perform migrations.
+-- Unlike SQL backends, uniqueness constraints cannot be created for you.
+-- You must place a unique index on unique fields.
 {-# LANGUAGE CPP, PackageImports, OverloadedStrings, ScopedTypeVariables  #-}
 {-# LANGUAGE GeneralizedNewtypeDeriving, MultiParamTypeClasses  #-}
 {-# LANGUAGE TypeSynonymInstances, FlexibleInstances, FlexibleContexts #-}
@@ -54,6 +59,7 @@
     , PortID
 
     -- * MongoDB driver types
+    , Database
     , DB.Action
     , DB.AccessMode(..)
     , DB.master
@@ -718,7 +724,7 @@
 -- $filters
 --
 -- You can find example usage for all of Persistent in our test cases:
--- https://github.com/yesodweb/persistent/blob/master/persistent-test/EmbedTest.hs#L144
+-- <https://github.com/yesodweb/persistent/blob/master/persistent-test/EmbedTest.hs#L144>
 --
 -- These filters create a query that reaches deeper into a document with
 -- nested fields.
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:         1.1.5
+version:         1.1.5.1
 license:         MIT
 license-file:    LICENSE
 author:          Greg Weber <greg@gregweber.info>