diff --git a/HueAPI.cabal b/HueAPI.cabal
--- a/HueAPI.cabal
+++ b/HueAPI.cabal
@@ -1,5 +1,5 @@
 name:                HueAPI
-version:             0.1.3
+version:             0.1.4
 synopsis:            API for controlling Philips Hue lights
 description:
 homepage:            https://github.com/sjoerdvisscher/HueAPI
@@ -19,5 +19,5 @@
                        http-conduit >=2.0 && <2.2,
                        network >=2.4 && <2.6,
                        containers ==0.5.*,
-                       transformers ==0.3.*,
-                       mtl ==2.1.*
+                       transformers >=0.3 && <0.5,
+                       mtl >=2.1 && <2.3
diff --git a/HueAPI.hs b/HueAPI.hs
--- a/HueAPI.hs
+++ b/HueAPI.hs
@@ -25,8 +25,8 @@
 import Control.Applicative
 import Control.Monad
 import Control.Monad.IO.Class
-import Control.Monad.State (StateT(..), get, put)
-import Control.Monad.Reader (ReaderT(..), ask)
+import Control.Monad.State (StateT(StateT), runStateT, get, put)
+import Control.Monad.Reader (ReaderT(ReaderT), runReaderT, ask)
 import Control.Concurrent