diff --git a/src/Control/Concurrent/Suspend/Lifted.hs b/src/Control/Concurrent/Suspend/Lifted.hs
--- a/src/Control/Concurrent/Suspend/Lifted.hs
+++ b/src/Control/Concurrent/Suspend/Lifted.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE FlexibleContexts #-}
+
 module Control.Concurrent.Suspend.Lifted
 ( suspend
 
@@ -13,6 +15,7 @@
 ------------------------------------------------------------------------------
 import           Control.Concurrent.Lifted (threadDelay)
 import           Control.Monad             (when)
+import           Control.Monad.Base        (MonadBase)
 ------------------------------------------------------------------------------
 import           Control.Concurrent.Delay
 ------------------------------------------------------------------------------
@@ -23,7 +26,7 @@
 --
 -- There is no guarantee that the thread will be rescheduled promptly when the
 -- delay has expired, but the thread will never continue to run earlier than specified.
-suspend :: Delay -> IO ()
+suspend :: MonadBase IO m => Delay -> m ()
 suspend (Delay us) = when (us > 0) $ do
     let wait = min us $ fromIntegral (maxBound :: Int)
     threadDelay (fromIntegral wait)
diff --git a/suspend.cabal b/suspend.cabal
--- a/suspend.cabal
+++ b/suspend.cabal
@@ -1,5 +1,5 @@
 name:                suspend
-version:             0.1.0.0
+version:             0.1.0.1
 synopsis:            Simple package that allows for long thread suspensions.
 description:         Simple package that allows for long thread suspensions. Uses newtype wrapper (of Int64 at the moment) to represent delay.
 license:             BSD3
@@ -25,8 +25,9 @@
         Control.Concurrent.Delay
 
     build-depends:
-        base        == 4.5.*
-      , lifted-base == 0.1.*
+        base              == 4.5.*
+      , lifted-base       == 0.1.*
+      , transformers-base == 0.4.*
 
     hs-source-dirs:      src
     ghc-options:         -Wall -fwarn-unused-imports