diff --git a/CHANGES.rst b/CHANGES.rst
index 91e68f6a..f2a8fab4 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,7 +2,7 @@
  Changes
 =========
 
-6.1 (unreleased)
+6.1 (2023-10-05)
 ================
 
 - Build Linux binary wheels for Python 3.12.
diff --git a/setup.py b/setup.py
index 1fdf14d2..4f2d43b3 100644
--- a/setup.py
+++ b/setup.py
@@ -100,7 +100,7 @@ def read(*rnames):
         )
 
 setup(name='zope.interface',
-      version='6.1.dev0',
+      version='6.1',
       url='https://github.com/zopefoundation/zope.interface',
       license='ZPL 2.1',
       description='Interfaces for Python',