diff --git a/atomic-primops.cabal b/atomic-primops.cabal
--- a/atomic-primops.cabal
+++ b/atomic-primops.cabal
@@ -1,5 +1,5 @@
 Name:                atomic-primops
-Version:             0.6.1
+Version:             0.6.1.1
 License:             BSD3
 License-file:        LICENSE
 Author:              Ryan Newton
@@ -97,7 +97,7 @@
 
   -- casMutVar# had a bug in GHC 7.2, thus we require GHC 7.4 or greater
   -- (base 4.5 or greater). We also need the "Any" kind.
-  build-depends:     base >= 4.6.0.0 && < 4.8.0.0, ghc-prim, primitive
+  build-depends:     base >= 4.6.0.0 && < 4.9, ghc-prim, primitive
 
   -- TODO: Try to push support back to 7.0, but make it default to an implementation
   -- other than Unboxed.