diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,10 +1,14 @@
-2014-07-25 Rodrigo Setti <rodrigosetti@gmail.com>
+2014-11-13 Rodrigo Setti <rodrigosetti@gmail.com>
 
-	* Initial version: Serialize instances tested for consistency.
-	* Missing: Extension types
+    * Changes `ObjectInt` data from `Int` to `Int64`, so it can be possible
+      to pack a 64bit int on a 32bit system.
 
 2014-07-25 Rodrigo Setti <rodrigosetti@gmail.com>
 
-	* Fix a fatal bug: Data.MessagePack.Spec was not exposed, thus failing the
-	package installation.
+    * Fix a fatal bug: Data.MessagePack.Spec was not exposed, thus failing the
+    package installation.
 
+2014-07-25 Rodrigo Setti <rodrigosetti@gmail.com>
+
+    * Initial version: Serialize instances tested for consistency.
+    * Missing: Extension types
diff --git a/Data/MessagePack.hs b/Data/MessagePack.hs
--- a/Data/MessagePack.hs
+++ b/Data/MessagePack.hs
@@ -26,8 +26,8 @@
 import qualified Data.ByteString  as BS
 import qualified Data.Map as M
 
-data Object = ObjectInt Int
-            | ObjectNil
+data Object = ObjectNil
+            | ObjectInt    Int64
             | ObjectBool   Bool
             | ObjectFloat  Float
             | ObjectDouble Double
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -5,3 +5,4 @@
 [Serialize](http://hackage.haskell.org/package/cereal) instance for
 [Message Pack](http://msgpack.org) Object.
 
+For a for Message Pack RPC (remote procedure call) support library, check [messagepack-rpc](http://hackage.haskell.org/package/messagepack-rpc).
diff --git a/messagepack.cabal b/messagepack.cabal
--- a/messagepack.cabal
+++ b/messagepack.cabal
@@ -1,5 +1,5 @@
 name               : messagepack
-version            : 0.2.0
+version            : 0.2.1
 synopsis           : Serialize instance for Message Pack Object
 description        : Serialize instance for Message Pack Object
 homepage           : https://github.com/rodrigosetti/messagepack