diff --git a/Control/Comonad/Trans/Env/Lazy.hs b/Control/Comonad/Trans/Env/Lazy.hs
--- a/Control/Comonad/Trans/Env/Lazy.hs
+++ b/Control/Comonad/Trans/Env/Lazy.hs
@@ -20,7 +20,7 @@
   , env
   , runEnv
   -- * The environment comonad transformer
-  , EnvT
+  , EnvT(..)
   , runEnvT
   -- * Combinators
   , ask
diff --git a/comonad-transformers.cabal b/comonad-transformers.cabal
--- a/comonad-transformers.cabal
+++ b/comonad-transformers.cabal
@@ -1,6 +1,6 @@
 name:          comonad-transformers
 category:      Control, Comonads
-version:       0.4
+version:       0.4.1
 license:       BSD3
 cabal-version: >= 1.2
 license-file:  LICENSE