diff --git a/CHANGES.rst b/CHANGES.rst
index 1c3851d..cf895cd 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,10 +1,11 @@
 zope.testrunner Changelog
 *************************
 
-4.4.6 (unreleased)
+4.4.6 (2015-01-21)
 ==================
 
-- Nothing changed yet.
+- Restore support for instance-based test layers that regressed in 4.4.5
+  (`#20 <https://github.com/zopefoundation/zope.testrunner/pull/20>`_).
 
 
 4.4.5 (2015-01-06)
diff --git a/setup.py b/setup.py
index d597e0c..9e7ffd8 100644
--- a/setup.py
+++ b/setup.py
@@ -122,7 +122,7 @@ def run_tests(self):
 
 setup(
     name='zope.testrunner',
-    version='4.4.6.dev0',
+    version='4.4.6',
     url='http://pypi.python.org/pypi/zope.testrunner',
     license='ZPL 2.1',
     description='Zope testrunner script.',