diff --git a/CHANGES.rst b/CHANGES.rst
index 89f97e2e..c7130d8d 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,4 +1,4 @@
-0.4 (unreleased)
+0.4 (2019-07-20)
 ================
 
 - Added the ability to use ``*`` and ``?`` wildcards in
diff --git a/setup.cfg b/setup.cfg
index c75e605c..bbd54cd6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = pytest-openfiles
-version = 0.4.0.dev0
+version = 0.4.0
 url = https://astropy.org
 author = The Astropy Developers
 author_email = astropy.team@gmail.com