diff --git a/hake.cabal b/hake.cabal
--- a/hake.cabal
+++ b/hake.cabal
@@ -1,5 +1,5 @@
 Name:		hake
-Version:	1.3.3
+Version:	1.3.4
 License:	GPL
 License-file:	LICENSE
 Author:		Yoshikuni Jujo
@@ -76,7 +76,7 @@
 
 Library
   GHC-Options:		-Wall
-  Build-Depends:	base<=3.0.3.0, old-time, mtl, filepath
+  Build-Depends:	base<=4.1.0.0, old-time, mtl, filepath
   Exposed-Modules:	Development.Hake, Development.Hake.OldFunSet, Development.Hake.FunSet, Development.Hake.FunSetRaw, Development.Hake.FunSetIO
   Other-Modules:	Development.Hake.Variables, Development.Hake.Types, Development.Hake.Tools, Development.Hake.RunHake, Development.Hake.Core