diff --git a/net-mqtt-rpc.cabal b/net-mqtt-rpc.cabal
--- a/net-mqtt-rpc.cabal
+++ b/net-mqtt-rpc.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: da1d3fe3c6516d04fb3e2f8b30e4a1b7d45d7533d80c5e4aea13b9cf4a2d4b3e
+-- hash: 8c7bbdf8d12bc49e03d00f8b0e716127bf59b807b6aac96a7ca1ac0f1143070b
 
 name:           net-mqtt-rpc
-version:        0.1.1.0
+version:        0.1.2.0
 synopsis:       Make RPC calls via an MQTT broker.
 description:    Please see the README on GitHub at <https://github.com/dustin/net-mqtt-rpc#readme>
 category:       Network
diff --git a/src/Network/MQTT/RPC.hs b/src/Network/MQTT/RPC.hs
--- a/src/Network/MQTT/RPC.hs
+++ b/src/Network/MQTT/RPC.hs
@@ -8,8 +8,7 @@
 import           Control.Concurrent.STM (atomically, newTChanIO, readTChan,
                                          writeTChan)
 import           Control.Monad          (when)
-import           Control.Monad.Catch    (MonadCatch (..), MonadThrow (..),
-                                         bracket, throwM)
+import           Control.Monad.Catch    (bracket, throwM)
 import           Control.Monad.IO.Class (MonadIO (..))
 import qualified Data.ByteString.Lazy   as BL
 import           Data.Text              (Text)
@@ -29,7 +28,7 @@
 -- Note that this client provides no timeouts or retries.  MQTT will
 -- guarantee the request message is delivered to the broker, but if
 -- there's nothing to pick it up, there may never be a response.
-call :: (MonadCatch m, MonadThrow m, MonadIO m) => MQTTClient -> Topic -> BL.ByteString -> m BL.ByteString
+call :: MonadIO m => MQTTClient -> Topic -> BL.ByteString -> m BL.ByteString
 call mc topic req = liftIO do
   r <- newTChanIO
   corr <- BL.fromStrict . UUID.toASCIIBytes <$> randomIO