diff --git a/contravariant.cabal b/contravariant.cabal
--- a/contravariant.cabal
+++ b/contravariant.cabal
@@ -1,6 +1,6 @@
 name:          contravariant
 category:      Control, Data
-version:       0.1.2
+version:       0.1.2.1
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -19,7 +19,7 @@
 
 library
   build-depends: 
-    base < 4.5,
+    base < 5,
     transformers >= 0.2.2 && < 0.3
   exposed-modules: 
     Data.Functor.Contravariant