diff --git a/nqe.cabal b/nqe.cabal
--- a/nqe.cabal
+++ b/nqe.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 19f64f288f8fa8f0b4739515e746d714754ce23701b7de65011a179d52826f16
+-- hash: a9ba15118eebb5f3b7c7996d90bc459e31f1d09bc3773d436c88a55e4fb6b3a6
 
 name:           nqe
-version:        0.2.0.0
+version:        0.3.0.0
 synopsis:       Concurrency library in the style of Erlang/OTP
 description:    Minimalistic actor library inspired by Erlang/OTP with support for supervisor hierarchies and asynchronous messages, as well as abstractions for synchronous communication and easy management of TCP connections.
 category:       Control
diff --git a/src/Control/Concurrent/NQE/Process.hs b/src/Control/Concurrent/NQE/Process.hs
--- a/src/Control/Concurrent/NQE/Process.hs
+++ b/src/Control/Concurrent/NQE/Process.hs
@@ -1,13 +1,11 @@
 {-# LANGUAGE ExistentialQuantification #-}
 {-# LANGUAGE FlexibleContexts          #-}
-{-# LANGUAGE LambdaCase                #-}
 {-# LANGUAGE MultiParamTypeClasses     #-}
 {-# LANGUAGE RankNTypes                #-}
 module Control.Concurrent.NQE.Process where
 
 import           Control.Monad
 import           UnliftIO
-import           UnliftIO.Concurrent
 
 type Reply a = a -> STM ()
 type Listen a = a -> STM ()
@@ -99,13 +97,3 @@
 
 receiveMatchSTM :: (Mailbox mbox) => mbox msg -> (msg -> Maybe a) -> STM a
 receiveMatchSTM mbox f = dispatchSTM [f] mbox
-
-timeout ::
-       forall m b. (MonadUnliftIO m)
-    => Int
-    -> m b
-    -> m (Maybe b)
-timeout n action =
-    race (liftIO $ threadDelay n) action >>= \case
-        Left () -> return Nothing
-        Right r -> return $ Just r
diff --git a/test/Spec.hs b/test/Spec.hs
--- a/test/Spec.hs
+++ b/test/Spec.hs
@@ -13,8 +13,7 @@
 import           Data.Conduit.TMChan
 import           Data.Text              (Text)
 import           Test.Hspec
-import           UnliftIO.Async
-import           UnliftIO.STM
+import           UnliftIO
 
 data Pong = Pong deriving (Eq, Show)
 newtype Ping = Ping (Pong -> STM ())