diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 7595e104..2940441b 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,11 @@
 Changelog
 ---------
 
+*unreleased*
+~~~~~~~~~~~~
+
+No unreleased changes.
+
 21.2 - 2021-10-29
 ~~~~~~~~~~~~~~~~~
 
diff --git a/packaging/__about__.py b/packaging/__about__.py
index c359122f..c5e047f9 100644
--- a/packaging/__about__.py
+++ b/packaging/__about__.py
@@ -17,7 +17,7 @@
 __summary__ = "Core utilities for Python packages"
 __uri__ = "https://github.com/pypa/packaging"
 
-__version__ = "21.2"
+__version__ = "21.3.dev0"
 
 __author__ = "Donald Stufft and individual contributors"
 __email__ = "donald@stufft.io"