diff --git a/process.cabal b/process.cabal
index 18756d852dfbd86a6745d8b1a6dfd835e472e5e7..66c15b5f42724da29ebfffc5a5c0d40ec688f650 100644
--- a/process.cabal
+++ b/process.cabal
@@ -60,7 +60,7 @@ library
         cpp-options: -DWINDOWS
     else
         other-modules: System.Process.Posix
-        build-depends: unix >= 2.5 && < 2.8
+        build-depends: unix >= 2.5 && < 2.9
 
     c-sources:
         cbits/runProcess.c