diff --git a/unix.cabal b/unix.cabal
index 01daef30cfc35e18f73c3b955c441b89b94f9a29..a6f95e4f7fe0f5fe6d9a4bff70051ab89446e5c0 100644
--- a/unix.cabal
+++ b/unix.cabal
@@ -47,7 +47,7 @@ Library
         System.Posix.Signals.Exts
         System.Posix.Semaphore
         System.Posix.SharedMem
-    build-depends:	base >= 4.2 && < 4.4
+    build-depends:	base >= 4.2 && < 4.5
     extensions: CPP, ForeignFunctionInterface, EmptyDataDecls
     if impl(ghc >= 7.1)
         extensions: NondecreasingIndentation