--- a/pipes-zlib.cabal
+++ b/pipes-zlib.cabal
@@ -26,7 +26,7 @@
                      Pipes.GZip
     build-depends:   base >= 4.5 && < 5.0
                    , transformers >= 0.2 && < 0.6
-                   , pipes >= 4.0 && < 4.3
+                   , pipes >= 4.0
                    , bytestring >= 0.9.2.1
                    , streaming-commons >= 0.1.15 && < 0.2
     ghc-options: -Wall -O2