diff --git a/breve.cabal b/breve.cabal
index 94d251c..fe1ebe6 100644
--- a/breve.cabal
+++ b/breve.cabal
@@ -29,7 +29,8 @@ executable breve
   other-modules:     Application, Breve.Common,
                      Breve.Generator, Breve.UrlTable
   other-extensions:  OverloadedStrings
-  build-depends:     base ==4.*, simple, wai, wai-extra, warp,
+  build-depends:     base >=4.8 && <5.0,
+                     simple, wai, wai-extra, warp,
                      aeson, bytestring, binary,
                      transformers, mtl,
                      hashtables, cryptohash, random,