diff --git a/CHANGES.txt b/CHANGES.txt
index bba1195..8a4fe86 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,5 @@
+Aug 18, 2013 - v0.4.0  Added append method.
+
 Aug 15, 2013 - v0.3.2  Fixed test bug where missing Pillow package caused test
     failures.
 
diff --git a/docs/source/conf.py b/docs/source/conf.py
index cf140a3..fb2a685 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -76,9 +76,9 @@ copyright = u'2013, John Evans'
 # built documents.
 #
 # The short X.Y version.
-version = '0.3'
+version = '0.4'
 # The full version, including alpha/beta/rc tags.
-release = '0.3.2'
+release = '0.4.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/setup.py b/setup.py
index 5cd8376..b57fef1 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup, find_packages
 import sys
 
 kwargs = {'name': 'Glymur',
-          'version': '0.3.2',
+          'version': '0.4.0rc1',
           'description': 'Tools for accessing JPEG2000 files',
           'long_description': open('README.md').read(),
           'author': 'John Evans',