diff --git a/Changelog.rst b/Changelog.rst
index acdf1fea..64d65af8 100644
--- a/Changelog.rst
+++ b/Changelog.rst
@@ -1,7 +1,7 @@
 Changelog
 =========
 
-Under development
+3.21.0 (30 September 2024)
 ++++++++++++++++++++++++++
 
 New features
diff --git a/lib/Crypto/__init__.py b/lib/Crypto/__init__.py
index 127f6b7b..607107dd 100644
--- a/lib/Crypto/__init__.py
+++ b/lib/Crypto/__init__.py
@@ -1,6 +1,6 @@
 __all__ = ['Cipher', 'Hash', 'Protocol', 'PublicKey', 'Util', 'Signature',
            'IO', 'Math']
 
-version_info = (3, 21, '0b0')
+version_info = (3, 21, '0')
 
 __version__ = ".".join([str(x) for x in version_info])