diff --git a/CHANGELOG.md b/CHANGELOG.md
index f742a8a..9f7265a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+* Version 1.5
+    * Hide internal helper functions from module's exported names.
+    * Make unit tests more portable among interpreters (CPython, PyPy).
+    * Update documentation for PyPy support.
+
 * Version 1.4
     * Add type checking to Ext class initialization.
     * Add support for Python 2.6.
diff --git a/README.md b/README.md
index 41a57bb..213f7ad 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# u-msgpack-python v1.4
+# u-msgpack-python v1.5
 
 u-msgpack-python is a lightweight [MessagePack](http://msgpack.org/) serializer and deserializer module, compatible with both Python 2 and 3, as well CPython and PyPy implementations of Python. u-msgpack-python is fully compliant with the latest [MessagePack specification](https://github.com/msgpack/msgpack/blob/master/spec.md). In particular, it supports the new binary, UTF-8 string, and application ext types.
 
@@ -81,7 +81,7 @@ b'\x01\x02\x03'
 
 ## Compatibility Mode
 
-u-msgpack-python offers a compatibility mode for the [old specification](https://github.com/msgpack/msgpack/blob/master/spec-old.md) "raw" bytes msgpack type. When the compatibility mode is enabled, u-msgpack-python will serialize both unicode strings and bytes into the "raw" msgpack type, and deserialize the "raw" msgpack type into bytes. To enable compatibility mode, simply set the `compatibility` boolean of the umsgpack module to `True`.
+u-msgpack-python offers a compatibility mode for the [old specification](https://github.com/msgpack/msgpack/blob/master/spec-old.md) to handle the old "raw" bytes msgpack type. When the compatibility mode is enabled, u-msgpack-python will serialize both unicode strings and bytes into the old "raw" msgpack type, and deserialize the "raw" msgpack type into bytes. To enable compatibility mode, simply set the `compatibility` boolean of the umsgpack module to `True`.
 
 ``` python
 >>> umsgpack.compatibility = True
diff --git a/msgpack.org.md b/msgpack.org.md
index 0ab1ad4..5045031 100644
--- a/msgpack.org.md
+++ b/msgpack.org.md
@@ -1,4 +1,4 @@
-# u-msgpack-python v1.4
+# u-msgpack-python v1.5
 
 u-msgpack-python is a lightweight [MessagePack](http://msgpack.org/) serializer and deserializer module, compatible with both Python 2 and 3, as well CPython and PyPy implementations of Python. u-msgpack-python is fully compliant with the latest [MessagePack specification](https://github.com/msgpack/msgpack/blob/master/spec.md).
 
diff --git a/setup.py b/setup.py
index 1cb0b9a..095becc 100644
--- a/setup.py
+++ b/setup.py
@@ -2,13 +2,13 @@
 
 setup(
     name='u-msgpack-python',
-    version='1.4',
-    description='A lightweight msgpack serializer and deserializer written in pure Python.',
+    version='1.5',
+    description='A portable, lightweight msgpack serializer and deserializer written in pure Python.',
     author='vsergeev',
     author_email='vsergeev at gmail',
     url='https://github.com/vsergeev/u-msgpack-python',
     py_modules=['umsgpack'],
-    long_description="""u-msgpack-python is a lightweight `MessagePack <http://msgpack.org/>`_ serializer and deserializer module, compatible with both Python 2 and Python 3, as well as CPyhton and PyPy implementations of Python. u-msgpack-python is fully compliant with the latest `MessagePack specification <https://github.com/msgpack/msgpack/blob/master/spec.md>`_. In particular, it supports the new binary, UTF-8 string, and application ext types. See https://github.com/vsergeev/u-msgpack-python for more information.""",
+    long_description="""u-msgpack-python is a lightweight `MessagePack <http://msgpack.org/>`_ serializer and deserializer module written in pure Python, compatible with both Python 2 and Python 3, as well as CPython and PyPy implementations of Python. u-msgpack-python is fully compliant with the latest `MessagePack specification <https://github.com/msgpack/msgpack/blob/master/spec.md>`_. In particular, it supports the new binary, UTF-8 string, and application ext types. See https://github.com/vsergeev/u-msgpack-python for more information.""",
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "License :: OSI Approved :: MIT License",