diff --git a/pugs-compat.cabal b/pugs-compat.cabal
--- a/pugs-compat.cabal
+++ b/pugs-compat.cabal
@@ -1,5 +1,5 @@
 Name           : pugs-compat
-Version        : 0.0.6.20120229.163800
+Version        : 0.0.6.20120717.204800
 Build-type     : Simple
 Category       : Pugs
 License        : BSD3
@@ -17,7 +17,7 @@
                     UndecidableInstances, FlexibleContexts, OverlappingInstances, TypeOperators
 
   Build-depends   : base >=4 && < 5, time, directory, process, regex-pcre-builtin, regex-base,
-                    random, network, containers, bytestring, array, mtl < 2.0.0.0, stm, utf8-string, syb,
+                    random, network, containers, bytestring, array, mtl >= 2.0.0.0, stm, utf8-string, syb,
                     stringtable-atom >= 0.0.6.1
   Exposed-modules : Pugs.Compat
   Other-modules   : Pugs.Compat.Cast Pugs.Compat.Global Pugs.Compat.ID