diff --git a/Database/Persist/Postgresql.hs b/Database/Persist/Postgresql.hs
--- a/Database/Persist/Postgresql.hs
+++ b/Database/Persist/Postgresql.hs
@@ -54,7 +54,6 @@
 import qualified Data.Text.Encoding as T
 import qualified Blaze.ByteString.Builder.Char8 as BBB
 
-import Data.Time.LocalTime (localTimeToUTC, utc)
 import Data.Text (Text)
 import Data.Aeson
 import Control.Monad (forM, mzero)
@@ -106,17 +105,17 @@
 -- | Same as 'withPostgresqlPool', but instead of opening a pool
 -- of connections, only one connection is opened.
 withPostgresqlConn :: (MonadIO m, MonadBaseControl IO m, MonadLogger m)
-                   => ConnectionString -> (Connection -> m a) -> m a
+                   => ConnectionString -> (SqlBackend -> m a) -> m a
 withPostgresqlConn = withSqlConn . open'
 
-open' :: ConnectionString -> LogFunc -> IO Connection
+open' :: ConnectionString -> LogFunc -> IO SqlBackend
 open' cstr logFunc = PG.connectPostgreSQL cstr >>= openSimpleConn logFunc
 
 -- | Generate a 'Connection' from a 'PG.Connection'
-openSimpleConn :: LogFunc -> PG.Connection -> IO Connection
+openSimpleConn :: LogFunc -> PG.Connection -> IO SqlBackend
 openSimpleConn logFunc conn = do
     smap <- newIORef $ Map.empty
-    return Connection
+    return SqlBackend
         { connPrepare    = prepare' conn
         , connStmtMap    = smap
         , connInsertSql  = insertSql'
diff --git a/persistent-postgresql.cabal b/persistent-postgresql.cabal
--- a/persistent-postgresql.cabal
+++ b/persistent-postgresql.cabal
@@ -1,5 +1,5 @@
 name:            persistent-postgresql
-version:         2.0.5
+version:         2.1
 license:         MIT
 license-file:    LICENSE
 author:          Felipe Lessa, Michael Snoyman <michael@snoyman.com>
@@ -16,9 +16,9 @@
 library
     build-depends:   base                  >= 4        && < 5
                    , transformers          >= 0.2.1
-                   , postgresql-simple     >= 0.3.10   && < 0.5
+                   , postgresql-simple     >= 0.4.0    && < 0.5
                    , postgresql-libpq      >= 0.6.1    && < 0.10
-                   , persistent            >= 2.0.5    && < 2.1
+                   , persistent            >= 2.1      && < 3
                    , containers            >= 0.2
                    , bytestring            >= 0.9
                    , text                  >= 0.7