diff --git a/CHANGELOG.md b/CHANGELOG.md
index c040c15..f742a8a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
+* Version 1.4
+    * Add type checking to Ext class initialization.
+    * Add support for Python 2.6.
+
 * Version 1.2
     * Add compatibility mode to support old specification "raw" bytes msgpack
       type.
 
 * Version 1.0
     * Initial release.
+
diff --git a/README.md b/README.md
index 3916d38..23b4a8c 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# u-msgpack-python v1.2
+# u-msgpack-python v1.4
 
 u-msgpack-python is a lightweight [MessagePack](https://github.com/msgpack/msgpack) serializer and deserializer module, compatible with both Python 2 and Python 3. u-msgpack-python is fully compliant with the latest [MessagePack specification](https://github.com/msgpack/msgpack/blob/master/spec.md), as of September 29, 2013. In particular, it supports the new binary, UTF-8 string, and application ext types.
 
diff --git a/msgpack.org.md b/msgpack.org.md
index b2de8ad..b5640ae 100644
--- a/msgpack.org.md
+++ b/msgpack.org.md
@@ -1,4 +1,4 @@
-# u-msgpack-python v1.2
+# u-msgpack-python v1.4
 
 u-msgpack-python is a lightweight [MessagePack](http://msgpack.org/) serializer and deserializer module, compatible with both Python 2 and Python 3. u-msgpack-python is fully compliant with the latest [MessagePack specification](https://github.com/msgpack/msgpack/blob/master/spec.md).