diff --git a/roman-numerals.cabal b/roman-numerals.cabal
--- a/roman-numerals.cabal
+++ b/roman-numerals.cabal
@@ -1,5 +1,5 @@
 name:          roman-numerals
-version:       0.5.1.3
+version:       0.5.1.4
 cabal-version: >= 1.6
 build-type:    Simple
 stability:     stable
@@ -23,9 +23,9 @@
   location: git://github.com/roelvandijk/roman-numerals.git
 
 library
-  build-depends: base                 >= 3.0.3.1 && < 4.7
-               , base-unicode-symbols >= 0.1.1   && < 0.3
-               , bytestring           >= 0.9.1   && < 0.11
-               , text                 >= 0.11    && < 1.2
+  build-depends: base                 >= 4     && < 5
+               , base-unicode-symbols >= 0.1.1 && < 0.3
+               , bytestring           >= 0.9.1 && < 0.11
+               , text                 >= 0.11  && < 1.2
   exposed-modules: Text.Numeral.Roman
   ghc-options: -Wall