diff --git a/CHANGES.rst b/CHANGES.rst
index 185f300..f9b8046 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,11 @@
 Changes
 *******
 
+0.4.0 (2019-05-02)
+==================
+
+* Fixed certificate generation on Python 3.x (#12).
+
 0.3.7 (2018-02-07)
 ==================
 
diff --git a/setup.py b/setup.py
index 7f103bb..a80b5a0 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 
 name = 'birdhousebuilder.recipe.nginx'
 
-version = '0.3.7'
+version = '0.4.0'
 description = 'A Buildout recipe to install and configure Nginx with conda.'
 long_description = (
     open('README.rst').read() + '\n' +