diff --git a/amqp-conduit.cabal b/amqp-conduit.cabal
--- a/amqp-conduit.cabal
+++ b/amqp-conduit.cabal
@@ -1,67 +1,53 @@
-name:                amqp-conduit
-version:             0.2.0.0
-synopsis:            Conduit bindings for AMQP (see amqp package)
-description:         Conduit bindings for AMQP (see amqp package)
-Stability:           alpha
-license:             MIT
-license-file:        LICENSE
-author:              Toru Tomita
-copyright:           Copyright (c) 2015, Toru Tomita
--- patches.
-maintainer:          toru.tomita@gmail.com
-category:            Network
-build-type:          Simple
-Homepage:            http://github.com/tatac1/amqp-conduit/
--- Extra files to be distributed with the package, such as examples or a 
--- README.
--- extra-source-files:  
-
-cabal-version:       >=1.8
+name: amqp-conduit
+version: 0.3.0.0
+cabal-version: >=1.8
+build-type: Simple
+license: MIT
+license-file: LICENSE
+copyright: Copyright (c) 2015, Toru Tomita
+maintainer: toru.tomita@gmail.com
+stability: alpha
+homepage: http://github.com/tatac1/amqp-conduit/
+synopsis: Conduit bindings for AMQP (see amqp package)
+description:
+    Conduit bindings for AMQP (see amqp package)
+category: Network
+author: Toru Tomita
 
 source-repository head
-    type:     git
+    type: git
     location: https://github.com/tatac1/amqp-conduit
 
 library
-  -- Modules exported by the library.
-  exposed-modules:    Network.AMQP.Conduit
-  
-  -- Modules included in this library but not exported.
-  -- other-modules:      
-  
-  -- LANGUAGE extensions used by modules in this package.
-  -- other-extensions:    
-  
-  -- Other library packages from which modules are imported.
-  build-depends:       base >=4.7 && <4.9
-                     , conduit >= 1.2
-                     , amqp >= 0.10
-                     , resourcet
-                     , transformers
-                     , lifted-base
-                     , exceptions
-                     , transformers-base
-                     , mtl >= 2.1
-                     , monad-control
-                     , text
-  
-  -- Directories containing source files.
-  hs-source-dirs:      src     
-  ghc-options:         -Wall -fwarn-incomplete-patterns
-
+    exposed-modules:
+        Network.AMQP.Conduit
+    build-depends:
+        base >=4.7 && <5,
+        conduit ==1.2.*,
+        amqp ==0.14.*,
+        resourcet >=1.1.9 && <1.2,
+        transformers >=0.5.2.0 && <0.6,
+        lifted-base >=0.2.3.11 && <0.3,
+        exceptions >=0.8.3 && <0.9,
+        transformers-base >=0.4.4 && <0.5,
+        mtl >=2.1 && <2.3,
+        monad-control >=1.0.2.0 && <1.1,
+        text >=1.2.2.1 && <1.3
+    hs-source-dirs: src
+    ghc-options: -Wall -fwarn-incomplete-patterns
 
 test-suite test-amqp-conduit
-  build-depends:       amqp-conduit
-                     , base >=4.7 && <4.8
-                     , resourcet
-                     , conduit
-                     , bytestring
-                     , amqp
-                     , transformers
-                     , hspec >=2.0 && <2.1
-                     , HUnit == 1.2.5.*
-  type: exitcode-stdio-1.0
-  main-is: test.hs
-  hs-source-dirs: test
-  ghc-options: -Wall -fwarn-incomplete-patterns
-
+    type: exitcode-stdio-1.0
+    main-is: test.hs
+    build-depends:
+        amqp-conduit >=0.3.0.0 && <0.4,
+        base >=4.9.1.0 && <4.10,
+        resourcet >=1.1.9 && <1.2,
+        conduit >=1.2.11 && <1.3,
+        bytestring >=0.10.8.1 && <0.11,
+        amqp >=0.14.1 && <0.15,
+        transformers >=0.5.2.0 && <0.6,
+        hspec >=2.4.3 && <2.5,
+        HUnit >=1.5.0.0 && <1.6
+    hs-source-dirs: test
+    ghc-options: -Wall -fwarn-incomplete-patterns
diff --git a/src/Network/AMQP/Conduit.hs b/src/Network/AMQP/Conduit.hs
--- a/src/Network/AMQP/Conduit.hs
+++ b/src/Network/AMQP/Conduit.hs
@@ -1,6 +1,5 @@
 {-# LANGUAGE FlexibleContexts      #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
-{-# LANGUAGE OverloadedStrings     #-}
 {-# LANGUAGE TypeOperators         #-}
 -- |
 -- Conduit bindings for AMQP (see amqp package) https://hackage.haskell.org/package/amqp
@@ -10,7 +9,7 @@
 --
 -- /Example/:
 --
--- Connect to a server, declare a queue and an exchange and setup a callback for messages coming in on the queue. Then publish a single message to our new exchange
+-- Connect to a server, declare a queue and an exchange and setup a callback for messages coming in the queue, then publish a message to our new exchange
 --
 -- >{-# LANGUAGE OverloadedStrings #-}
 -- >
@@ -243,7 +242,7 @@
          -> Exchange
          -> ExchangeKey
          -> Message
-         -> IO ()
+         -> IO (Maybe Int)
 sendMsg conn exchange key msg = do
     publishMsg chan exchange key msg
     where