diff --git a/registry-messagepack.cabal b/registry-messagepack.cabal
--- a/registry-messagepack.cabal
+++ b/registry-messagepack.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           registry-messagepack
-version:        0.3.0.0
+version:        0.3.0.1
 synopsis:       MessagePack encoders / decoders
 description:    This library provides encoders / decoders which can be easily customized for the MessagePack format.
 category:       Data
diff --git a/src/Data/Registry/MessagePack/Decoder.hs b/src/Data/Registry/MessagePack/Decoder.hs
--- a/src/Data/Registry/MessagePack/Decoder.hs
+++ b/src/Data/Registry/MessagePack/Decoder.hs
@@ -12,7 +12,7 @@
 
 import Control.Monad.Fail
 import Data.List (nub)
-import Data.MessagePack
+import Data.MessagePack as MP
 import Data.Registry
 import Data.Registry.Internal.Types
 import Data.Registry.MessagePack.Options
@@ -25,7 +25,7 @@
 
 -- * DECODER DATA TYPE
 
-newtype Decoder a = Decoder {decode :: Object -> Result a}
+newtype Decoder a = Decoder {decode :: Object -> MP.Result a}
 
 instance Functor Decoder where
   fmap f (Decoder d) = Decoder (fmap f . d)