diff --git a/semigroups.cabal b/semigroups.cabal
--- a/semigroups.cabal
+++ b/semigroups.cabal
@@ -1,6 +1,6 @@
 name:          semigroups
 category:      Algebra, Data, Data Structures, Math
-version:       0.5.0
+version:       0.5.0.1
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -24,7 +24,7 @@
 
 library
   build-depends: 
-    base >= 4 && < 4.4, 
+    base >= 4 && < 5, 
     containers >= 0.3 && < 0.5
 
   ghc-options: -Wall