diff --git a/shelly.cabal b/shelly.cabal
--- a/shelly.cabal
+++ b/shelly.cabal
@@ -1,6 +1,6 @@
 Name:       shelly
 
-Version:     1.5.3
+Version:     1.5.3.1
 Synopsis:    shell-like (systems) programming in Haskell
 
 Description: Shelly provides convenient systems programming in Haskell,
@@ -49,7 +49,7 @@
     monad-control             >= 0.3.2 && < 0.4,
     lifted-base,
     lifted-async,
-    exceptions                >= 0.4,
+    exceptions                == 0.6.*,
     enclosed-exceptions,
     text, bytestring, async, transformers, transformers-base
 
diff --git a/src/Shelly/Base.hs b/src/Shelly/Base.hs
--- a/src/Shelly/Base.hs
+++ b/src/Shelly/Base.hs
@@ -81,6 +81,8 @@
 instance Catch.MonadCatch Sh where
   catch (Sh (ReaderT m)) c =
       Sh $ ReaderT $ \r -> m r `Catch.catch` \e -> runSh (c e) r
+
+instance Catch.MonadMask Sh where
   mask a = Sh $ ReaderT $ \e -> Catch.mask $ \u -> runSh (a $ q u) e
     where q u (Sh (ReaderT b)) = Sh (ReaderT (u . b))
   uninterruptibleMask a =
diff --git a/src/Shelly/Lifted.hs b/src/Shelly/Lifted.hs
--- a/src/Shelly/Lifted.hs
+++ b/src/Shelly/Lifted.hs
@@ -2,6 +2,7 @@
              FlexibleInstances, FlexibleContexts, IncoherentInstances,
              TypeFamilies, ExistentialQuantification, RankNTypes,
              ImpredicativeTypes #-}
+{-# OPTIONS_GHC -fno-warn-orphans #-}
 
 -- | A module for shell-like programming in Haskell.
 -- Shelly's focus is entirely on ease of use for those coming from shell scripting.