diff --git a/CHANGES.txt b/CHANGES.txt
index 3efcdbe..152e38d 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,6 +1,12 @@
 Changes
 =======
 
+0.5 (2010-03-31)
+----------------
+
+- 0.4 was mispackaged (CHANGES.txt missing); no code changes from 0.4
+  however.
+
 0.4 (2010-03-30)
 ----------------
 
diff --git a/docs/conf.py b/docs/conf.py
index f9f6a0a..edf3046 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -52,7 +52,7 @@ copyright = '2010, Repoze Developers <repoze-dev@lists.repoze.org>'
 # other places throughout the built documents.
 #
 # The short X.Y version.
-version = '0.4'
+version = '0.5'
 # The full version, including alpha/beta/rc tags.
 release = version
 
diff --git a/setup.py b/setup.py
index aab3962..f6a470c 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@ CHANGES = open(os.path.join(here, 'CHANGES.txt')).read()
 requires = ['iso8601']
 
 setup(name='colander',
-      version='0.4',
+      version='0.5',
       description=('A simple schema-based serialization and deserialization '
                    'library'),
       long_description=README + '\n\n' +  CHANGES,