diff --git a/TypeNat.cabal b/TypeNat.cabal
--- a/TypeNat.cabal
+++ b/TypeNat.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                TypeNat
-version:             0.4.0.0
+version:             0.4.0.1
 synopsis:            Some Nat-indexed types for GHC
 -- description:         
 homepage:            https://github.com/avieth/TypeNat
@@ -31,6 +31,6 @@
                      , TypeFamilies
                      , KindSignatures
 
-  build-depends:       base >=4.7 && < 4.8
+  build-depends:       base >=4.7 && < 4.9
   -- hs-source-dirs:      
   default-language:    Haskell2010