diff --git a/haskeline.cabal b/haskeline.cabal
index b63bb2d1e071c566f2a300883d7a01a6aed4b3dc..77b6985bd3e05930a41eda8b0b0bb63514e70b62 100644
--- a/haskeline.cabal
+++ b/haskeline.cabal
@@ -102,7 +102,7 @@ Library
         install-includes: win_console.h
         cpp-options: -DMINGW
     } else {
-        Build-depends: unix>=2.0 && < 2.6
+        Build-depends: unix>=2.0 && < 2.7
                         -- unix-2.3 doesn't build on ghc-6.8.1 or earlier
         Build-depends: utf8-string==0.3.* && >=0.3.6
         c-sources: cbits/h_iconv.c