diff --git a/CHANGES.txt b/CHANGES.txt
index 714b973..41fd0b3 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,8 +1,8 @@
 Changes
 =======
 
-Next release
-------------
+0.5.1 (2010-04-02)
+------------------
 
 - The constructor arguments to a the ``colander.Schema`` class are now
   sent to the constructed SchemaNode rather than to the type it represents.
diff --git a/docs/conf.py b/docs/conf.py
index edf3046..42789bc 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 = '0.5'
+version = '0.5.1'
 # The full version, including alpha/beta/rc tags.
 release = version
 
diff --git a/setup.py b/setup.py
index f6a470c..a5c6aca 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='0.5',
+      version='0.5.1',
       description=('A simple schema-based serialization and deserialization '
                    'library'),
       long_description=README + '\n\n' +  CHANGES,