diff --git a/pipes-extras.cabal b/pipes-extras.cabal
--- a/pipes-extras.cabal
+++ b/pipes-extras.cabal
@@ -1,5 +1,5 @@
 Name: pipes-extras
-Version: 1.0.3
+Version: 1.0.4
 Cabal-Version: >=1.10
 Build-Type: Simple
 License: BSD3
@@ -20,9 +20,9 @@
     HS-Source-Dirs: src
     Build-Depends:
         base         >= 4       && < 5  ,
-        pipes        >= 4.0     && < 4.2,
+        pipes        >= 4.0     && < 4.3,
         foldl        >= 1.0.1   && < 1.3,
-        transformers >= 0.2.0.0 && < 0.5
+        transformers >= 0.2.0.0 && < 0.6
     Exposed-Modules: Pipes.Extras
     GHC-Options: -O2 -Wall
     Default-Language: Haskell2010