diff --git a/DistanceUnits.cabal b/DistanceUnits.cabal
--- a/DistanceUnits.cabal
+++ b/DistanceUnits.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                DistanceUnits
-version:             0.1.0.0
+version:             0.1.0.1
 synopsis:            A comprehensive distance library
 description:         A corpus of real world distance units and tools for working with them
 homepage:            https://github.com/gambogi/DistanceUnits
@@ -23,6 +23,6 @@
 library
   exposed-modules:     DistanceUnits
   -- other-modules:       
-  build-depends:       base ==4.5.*
+  build-depends:       base >= 4.5 && < 5
   hs-source-dirs:      src
   extensions:          GeneralizedNewtypeDeriving