diff --git a/Data/Conduit/Internal/Pipe.hs b/Data/Conduit/Internal/Pipe.hs
--- a/Data/Conduit/Internal/Pipe.hs
+++ b/Data/Conduit/Internal/Pipe.hs
@@ -6,7 +6,6 @@
 {-# LANGUAGE UndecidableInstances #-}
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE TupleSections #-}
-{-# LANGUAGE ImpredicativeTypes #-}
 {-# LANGUAGE Trustworthy #-}
 module Data.Conduit.Internal.Pipe
     ( -- ** Types
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,8 @@
+## 1.2.6.2
+
+* resourcet cannot be built with GHC 8 [#242](https://github.com/snoyberg/conduit/issues/242)
+* Remove upper bound on transformers [#253](https://github.com/snoyberg/conduit/issues/253)
+
 ## 1.2.6
 
 * `sourceToList`
diff --git a/conduit.cabal b/conduit.cabal
--- a/conduit.cabal
+++ b/conduit.cabal
@@ -1,5 +1,5 @@
 Name:                conduit
-Version:             1.2.6.1
+Version:             1.2.6.2
 Synopsis:            Streaming data processing library.
 description:
     Hackage documentation generation is not reliable. For up to date documentation, please see: <http://www.stackage.org/package/conduit>.
@@ -32,7 +32,7 @@
                      , exceptions               >= 0.6
                      , lifted-base              >= 0.1
                      , transformers-base        >= 0.4.1        && < 0.5
-                     , transformers             >= 0.2.2        && < 0.5
+                     , transformers             >= 0.2.2
                      , mtl
                      , mmorph
   if !impl(ghc>=7.9)