diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,8 @@
+0.5
+---
+* Updated dependencies
+* Added `uninterruptiblMask` to the `MonadCatch` instance.
+
 0.4.1
 ---
 * Build fixes for GHC < 7.6
diff --git a/README.markdown b/README.markdown
--- a/README.markdown
+++ b/README.markdown
@@ -1,4 +1,6 @@
 tagged-transformer
 ==================
 
+[![Build Status](https://secure.travis-ci.org/ekmett/tagged-transformer.png)](http://travis-ci.org/ekmett/tagged-transformer)
+
 Monad transformer carrying an extra [phantom type](http://www.haskell.org/haskellwiki/Phantom_type) tag. 
diff --git a/src/Data/Functor/Trans/Tagged.hs b/src/Data/Functor/Trans/Tagged.hs
--- a/src/Data/Functor/Trans/Tagged.hs
+++ b/src/Data/Functor/Trans/Tagged.hs
@@ -53,7 +53,6 @@
 import Data.Functor.Bind (Apply(..), Bind(..))
 import Data.Functor.Extend (Extend(..))
 import Data.Functor.Plus (Alt(..), Plus(..))
-import Data.Functor.Identity (Identity(..))
 import Data.Functor.Contravariant (Contravariant(..))
 import Data.Proxy (Proxy(..))
 import Data.Reflection (Reifies(..))
@@ -64,7 +63,7 @@
 -- a @'Tagged' s b@ can't try to use the argument @s@ as a real value.
 --
 -- Moreover, you don't have to rely on the compiler to inline away the extra
--- argument, because the newtype is "free"
+-- argument, because the newtype is \"free\"
 
 newtype TaggedT s m b = TagT { untagT :: m b }
   deriving ( Eq, Ord, Read, Show )
@@ -226,7 +225,7 @@
 
 
 instance ComonadHoist (TaggedT s) where
-  cohoist = TagT . Identity . extract . untagT
+  cohoist f = TagT . f . untagT
   {-# INLINE cohoist #-}
 
 
@@ -238,6 +237,9 @@
   mask a = tag $ mask $ \u -> untag (a $ q u)
     where q u = tag . u . untag
   {-# INLINE mask #-}
+  uninterruptibleMask a = tag $ uninterruptibleMask $ \u -> untag (a $ q u)
+    where q u = tag . u . untag
+  {-# INLINE uninterruptibleMask#-}
 
 
 -- | Easier to type alias for 'TagT'
diff --git a/tagged-transformer.cabal b/tagged-transformer.cabal
--- a/tagged-transformer.cabal
+++ b/tagged-transformer.cabal
@@ -1,5 +1,5 @@
 name:           tagged-transformer
-version:        0.4.1
+version:        0.5
 license:        BSD3
 license-file:   LICENSE
 author:         Edward A. Kmett
@@ -28,14 +28,13 @@
   build-depends:
     array                     >= 0.3.0.2  && < 0.5,
     base                      >= 4        && < 5,
-    comonad                   >= 3        && < 4,
-    comonad-transformers      >= 3        && < 4,
+    comonad                   >= 4        && < 5,
     contravariant             >= 0.3      && < 1,
     distributive              >= 0.3      && < 1,
-    exceptions                >= 0.1.1    && < 0.2,
+    exceptions                >= 0.1.1    && < 1,
     mtl                       >= 2.0.1    && < 2.2,
     reflection                >= 1.1.6    && < 2,
-    semigroupoids             >= 3.0.2    && < 4,
+    semigroupoids             >= 4        && < 5,
     tagged                    >= 0.4.4    && < 1,
     transformers              >= 0.2      && < 0.4