diff --git a/sql-words.cabal b/sql-words.cabal
--- a/sql-words.cabal
+++ b/sql-words.cabal
@@ -1,5 +1,5 @@
 name:                sql-words
-version:             0.1.3.1
+version:             0.1.4.0
 synopsis:            Simple idea SQL keywords data constructor into OverloadedString
 description:         This package contiains SQL keywords constructors defined as
                      OverloadedString literals and helper functions to concate these.
@@ -22,14 +22,14 @@
   other-modules:
                         Language.SQL.Keyword.Internal.Type
 
-  build-depends:          base <5
+  build-depends:          base >=4.5 && <5
   hs-source-dirs:       src
   ghc-options:          -Wall
 
   default-language:     Haskell2010
 
 test-suite monoids
-  build-depends:         base <5
+  build-depends:         base >=4.5 && <5
                        , quickcheck-simple
                        , QuickCheck >=2
                        , sql-words
diff --git a/src/Language/SQL/Keyword/Internal/Type.hs b/src/Language/SQL/Keyword/Internal/Type.hs
--- a/src/Language/SQL/Keyword/Internal/Type.hs
+++ b/src/Language/SQL/Keyword/Internal/Type.hs
@@ -91,7 +91,7 @@
 
              | IS | NULL | IN
 
-             | DATE | TIME | TIMESTAMP | INTERVAL
+             | DATE | TIME | TIMESTAMP | TIMESTAMPTZ | INTERVAL
 
              | Sequence !DString
              deriving (Read, Show)