diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import           Distribution.Simple
+main = defaultMain
diff --git a/slack-web.cabal b/slack-web.cabal
--- a/slack-web.cabal
+++ b/slack-web.cabal
@@ -1,5 +1,5 @@
 name: slack-web
-version: 0.2.0.2
+version: 0.2.0.3
 
 build-type: Simple
 cabal-version: >= 1.21
@@ -50,9 +50,9 @@
     , http-api-data >= 0.3 && < 0.4
     , http-client >= 0.5 && < 0.6
     , http-client-tls >= 0.3 && < 0.4
-    , servant >= 0.12 && < 0.13
-    , servant-client >= 0.12 && < 0.13
-    , servant-client-core >= 0.12 && < 0.13
+    , servant >= 0.12 && < 0.14
+    , servant-client >= 0.12 && < 0.14
+    , servant-client-core >= 0.12 && < 0.14
     , text >= 1.2 && < 1.3
     , transformers
     , mtl
diff --git a/src/Web/Slack.hs b/src/Web/Slack.hs
--- a/src/Web/Slack.hs
+++ b/src/Web/Slack.hs
@@ -2,6 +2,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TypeFamilies #-}
 {-# LANGUAGE TypeOperators #-}
+{-# LANGUAGE CPP #-}
 
 ----------------------------------------------------------------------
 -- |
@@ -32,8 +33,8 @@
   , usersList
   , authenticateReq
   , Response
-  , HasManager
-  , HasToken
+  , HasManager(..)
+  , HasToken(..)
   )
   where
 
@@ -81,6 +82,11 @@
 -- text
 import Data.Text (Text)
 
+#if !MIN_VERSION_servant(0,13,0)
+mkClientEnv :: Manager -> BaseUrl -> ClientEnv
+mkClientEnv = ClientEnv
+#endif
+
 class HasManager a where
     getManager :: a -> Manager
 
@@ -543,7 +549,7 @@
 run clientAction = do
   env <- ask
   let baseUrl = BaseUrl Https "slack.com" 443 "/api"
-  unnestErrors <$> liftIO (runClientM clientAction $ ClientEnv (getManager env) baseUrl)
+  unnestErrors <$> liftIO (runClientM clientAction $ mkClientEnv (getManager env) baseUrl)
 
 mkSlackAuthenticateReq :: (MonadReader env m, HasToken env)
   => m (AuthenticatedRequest (AuthProtect "token"))
diff --git a/src/Web/Slack/Common.hs b/src/Web/Slack/Common.hs
--- a/src/Web/Slack/Common.hs
+++ b/src/Web/Slack/Common.hs
@@ -34,6 +34,8 @@
 import Data.Aeson.TH
 
 -- base
+import Control.Exception
+import Data.Typeable
 import GHC.Generics (Generic)
 
 -- http-api-data
@@ -140,4 +142,6 @@
     -- ^ errors from the network connection
     | SlackError Text
     -- ^ errors returned by the slack API
-  deriving (Eq, Generic, Show)
+  deriving (Eq, Generic, Show, Typeable)
+
+instance Exception SlackClientError