diff --git a/.gitignore b/.gitignore
index 477a353..fd75f42 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ cabal-dev
 *.chi
 *.chs.h
 .virthualenv
+.stack-work
diff --git a/hedis-simple.cabal b/hedis-simple.cabal
index 67d597a..d093e07 100644
--- a/hedis-simple.cabal
+++ b/hedis-simple.cabal
@@ -1,5 +1,5 @@
 name:                hedis-simple
-version:             0.1.0.0
+version:             0.1.1.0
 synopsis:            A simplified API for hedis
 description:         hedis-simple wraps most hedis commands in an EitherT monad to simplify a lot of the verbose error checking that one would normally have to perform.
 homepage:            http://github.com/sanetracker/hedis-simple
@@ -18,5 +18,9 @@ source-repository    head
 
 library
   exposed-modules:     Database.Redis.Simple
-  build-depends:       base ==4.6.*, mtl ==2.1.*, either ==3.4.*, bytestring ==0.10.*, hedis ==0.6.*
+  build-depends:       base >= 4.7 && < 5
+                     , mtl >= 2.1
+                     , either >= 3.4
+                     , bytestring >= 0.10
+                     , hedis == 0.6.*
   hs-source-dirs:      src
diff --git a/src/Database/Redis/Simple.hs b/src/Database/Redis/Simple.hs
index a470c3c..f8b3397 100644
--- a/src/Database/Redis/Simple.hs
+++ b/src/Database/Redis/Simple.hs
@@ -173,6 +173,7 @@ module Database.Redis.Simple (
 import Control.Applicative
 import Control.Monad.Trans
 import Control.Monad.Trans.Either
+import Control.Monad.Error.Class    
 import Data.ByteString (ByteString)
 import qualified Database.Redis as R
 
@@ -181,7 +182,7 @@ class WrappedRedis m mi r | m -> mi r where
   unwrap :: m a -> mi (r a)
 
 newtype Redis a = Redis { fromRedis :: EitherT R.Reply R.Redis a }
-  deriving (Functor, Applicative, Monad, MonadIO)
+  deriving (Functor, Applicative, Monad, MonadIO, MonadError R.Reply)
 
 newtype RedisTx a = RedisTx { fromRedisTx :: R.RedisTx (R.Queued a) }
 
diff --git a/stack.yaml b/stack.yaml
new file mode 100644
index 0000000..5d330fc
--- /dev/null
+++ b/stack.yaml
@@ -0,0 +1,32 @@
+# For more information, see: https://github.com/commercialhaskell/stack/blob/release/doc/yaml_configuration.md
+
+# Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
+resolver: lts-3.11
+
+# Local packages, usually specified by relative directory name
+packages:
+- '.'
+
+# Packages to be pulled from upstream that are not in the resolver (e.g., acme-missiles-0.3)
+extra-deps: []
+
+# Override default flag values for local packages and extra-deps
+flags: {}
+
+# Extra package databases containing global packages
+extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+
+# Require a specific version of stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: >= 0.1.4.0
+
+# Override the architecture used by stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+
+# Extra directories used by stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]