diff --git a/hzulip.cabal b/hzulip.cabal
--- a/hzulip.cabal
+++ b/hzulip.cabal
@@ -1,5 +1,5 @@
 name:                hzulip
-version:             1.1.0.3
+version:             1.1.0.4
 synopsis:            A haskell wrapper for the Zulip API.
 description:         This a Zulip API wrapper for Haskell.
 homepage:            https://github.com/yamadapc/hzulip
diff --git a/src/Web/HZulip.hs b/src/Web/HZulip.hs
--- a/src/Web/HZulip.hs
+++ b/src/Web/HZulip.hs
@@ -84,6 +84,7 @@
 import Control.Monad (void)
 import Control.Monad.Catch (catch, throwM)
 import Control.Monad.IO.Class (liftIO)
+import Control.Monad.Trans (lift)
 import Control.Monad.Trans.Reader (ask, runReaderT)
 import Data.Aeson (Value(..), decode, encode)
 import Data.Aeson.Lens (key, values, _String)