diff --git a/Database/Sql/Simple/PostgreSQL.hs b/Database/Sql/Simple/PostgreSQL.hs
--- a/Database/Sql/Simple/PostgreSQL.hs
+++ b/Database/Sql/Simple/PostgreSQL.hs
@@ -1,8 +1,10 @@
+{-# OPTIONS_GHC -fno-warn-orphans #-}
 {-# LANGUAGE TypeOperators #-}
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE TypeFamilies #-}
 {-# LANGUAGE DeriveDataTypeable #-}
 {-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE CPP #-}
 
 module Database.Sql.Simple.PostgreSQL
     ( PostgreSQL
@@ -16,7 +18,6 @@
 import Control.Monad
 import qualified Data.Text.Encoding as T
 import Data.Typeable
-import Data.Proxy
 import Data.Word
 import Database.Sql.Simple.Internal
 import qualified Database.PostgreSQL.Simple as PSql
@@ -26,6 +27,9 @@
 import qualified Database.PostgreSQL.Simple.FromField as PSql
 import qualified Database.PostgreSQL.Simple.Types as PSql
 import Data.Default.Class
+#if !MIN_VERSION_base(4,7,0)
+import Data.Proxy
+#endif
 
 data PostgreSQL = PostgreSQL PSql.Connection
     deriving Typeable
@@ -62,6 +66,9 @@
 
     query    (PostgreSQL c) t q = Sql $ PSql.query  c (psqlQuery t) q
     query_   (PostgreSQL c) t   = Sql $ PSql.query_ c (psqlQuery t)
+
+    fold  (PostgreSQL c) q = PSql.fold  c (psqlQuery q)
+    fold_ (PostgreSQL c) q = PSql.fold_ c (psqlQuery q)
 
     begin    (PostgreSQL c) = Sql $ PSql.begin c
     commit   (PostgreSQL c) = Sql $ PSql.commit c
diff --git a/sql-simple-postgresql.cabal b/sql-simple-postgresql.cabal
--- a/sql-simple-postgresql.cabal
+++ b/sql-simple-postgresql.cabal
@@ -1,5 +1,5 @@
 name:                sql-simple-postgresql
-version:             0.1.0.0
+version:             0.2.0
 synopsis:            postgresql backend for sql-simple
 -- description:         
 license:             MIT
@@ -17,7 +17,7 @@
   exposed-modules:     Database.Sql.Simple.PostgreSQL
   build-depends:       base                 >=4.6 && <4.8
                      , text                 >=1.1 && <1.2
-                     , sql-simple           >=0.1 && <0.2
+                     , sql-simple           >=0.2 && <0.3
                      , postgresql-simple    >=0.4 && <0.5
                      , data-default-class   >=0.0 && <0.1