diff --git a/ClassyPrelude.hs b/ClassyPrelude.hs
--- a/ClassyPrelude.hs
+++ b/ClassyPrelude.hs
@@ -15,6 +15,7 @@
     , module Control.Monad
       -- ** Mutable references
     , module Control.Concurrent.MVar.Lifted
+    , module Control.Concurrent.STM.Lifted
     , module Data.IORef.Lifted
       -- ** Debugging
     , trace
@@ -116,8 +117,10 @@
     , asLText
     , asList
     , asMap
+    , asIntMap
     , asMaybe
     , asSet
+    , asIntSet
     , asVector
     , asUVector
     , asSVector
@@ -128,6 +131,7 @@
 import Control.Exception.Enclosed
 import Control.Monad (when, unless, void, liftM, ap, forever, join, sequence, sequence_, replicateM_)
 import Control.Concurrent.MVar.Lifted
+import Control.Concurrent.STM.Lifted
 import Data.IORef.Lifted
 import qualified Data.Monoid as Monoid
 import qualified Data.Traversable as Traversable
@@ -301,11 +305,17 @@
 asMap :: Map k v -> Map k v
 asMap = id
 
+asIntMap :: IntMap v -> IntMap v
+asIntMap = id
+
 asMaybe :: Maybe a -> Maybe a
 asMaybe = id
 
 asSet :: Set a -> Set a
 asSet = id
+
+asIntSet :: IntSet -> IntSet
+asIntSet = id
 
 asVector :: Vector a -> Vector a
 asVector = id
diff --git a/classy-prelude.cabal b/classy-prelude.cabal
--- a/classy-prelude.cabal
+++ b/classy-prelude.cabal
@@ -1,5 +1,5 @@
 name:                classy-prelude
-version:             0.8.2
+version:             0.8.3
 synopsis:            A typeclass-based Prelude.
 description:         Focuses on using common typeclasses when possible, and creating new ones to avoid name clashing. Exposes many recommended datastructures (Map, ByteString, etc) directly without requiring long import lists and qualified modules.
 homepage:            https://github.com/snoyberg/classy-prelude
@@ -14,7 +14,7 @@
 library
   exposed-modules:     ClassyPrelude
   build-depends:       base                          >= 4          && < 5
-                     , basic-prelude                 >= 0.3.7      && < 0.4
+                     , basic-prelude                 >= 0.3.8      && < 0.4
                      , system-filepath               >= 0.4        && < 0.5
                      , transformers
                      , containers                    >= 0.4.2
@@ -32,6 +32,7 @@
                      , chunked-data
                      , enclosed-exceptions
                      , ghc-prim
+                     , stm-lifted
   ghc-options:         -Wall -fno-warn-orphans
 
 test-suite test