diff --git a/library/MTLPrelude.hs b/library/MTLPrelude.hs
--- a/library/MTLPrelude.hs
+++ b/library/MTLPrelude.hs
@@ -20,11 +20,16 @@
   hiding (callCC)
 
 
--- Error
+-- Except
 -------------------------
 
 import Control.Monad.Error.Class
   as Exports
+
+import Control.Monad.Trans.Except
+  as Exports
+  (ExceptT(ExceptT), Except, except, runExcept, runExceptT, 
+   mapExcept, mapExceptT, withExcept, withExceptT)
 
 
 -- Identity
diff --git a/mtl-prelude.cabal b/mtl-prelude.cabal
--- a/mtl-prelude.cabal
+++ b/mtl-prelude.cabal
@@ -1,7 +1,7 @@
 name:
   mtl-prelude
 version:
-  1.0.3
+  2.0.0
 synopsis:
   Reexports of most definitions from "mtl" and "transformers" 
 description:
@@ -13,9 +13,8 @@
   In combination with the <http://hackage.haskell.org/package/base-prelude "base-prelude"> library,
   this should give you a quite rich prelude.
   .
-  The @1.*@ versions are restricted by 
-  the feature set of @mtl == 2.0.*@ and @transformers == 0.2.*@, 
-  however they provide support for newer versions of those libraries as well.
+  The @2.*@ versions are are restricted by 
+  the feature set of @mtl == 2.2.*@ and @transformers == 0.4.*@.
 category:
   Prelude
 homepage:
@@ -52,10 +51,9 @@
   exposed-modules:
     MTLPrelude
   build-depends:
-    transformers >= 0.2 && < 0.5,
-    mtl >= 2.0 && < 2.3,
-    base < 5
+    transformers == 0.4.*,
+    mtl == 2.2.*
   default-extensions:
-    NoImplicitPrelude
+    Arrows, BangPatterns, ConstraintKinds, DataKinds, DefaultSignatures, DeriveDataTypeable, DeriveFunctor, DeriveGeneric, EmptyDataDecls, FlexibleContexts, FlexibleInstances, FunctionalDependencies, GADTs, GeneralizedNewtypeDeriving, ImpredicativeTypes, LambdaCase, LiberalTypeSynonyms, MagicHash, MultiParamTypeClasses, MultiWayIf, NoImplicitPrelude, NoMonomorphismRestriction, OverloadedStrings, PatternGuards, ParallelListComp, QuasiQuotes, RankNTypes, RecordWildCards, ScopedTypeVariables, StandaloneDeriving, TemplateHaskell, TupleSections, TypeFamilies, TypeOperators, UnboxedTuples
   default-language:
     Haskell2010