diff --git a/CHANGES b/CHANGES
index 25b9062f3..c98973254 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,7 +1,7 @@
 Pint Changelog
 ==============
 
-0.21 (unreleased)
+0.21 (2023-05-01)
 -----------------
 
 - Add PEP621/631 support.
diff --git a/version.py b/version.py
index c9114ddb6..1da2d0941 100644
--- a/version.py
+++ b/version.py
@@ -2,5 +2,5 @@
 # flake8: noqa
 
 # fmt: off
-__version__ = '0.21.dev0'
+__version__ = '0.21'
 # fmt: on