diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 81b7c6e6..3241b8fe 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,11 @@
 Changelog
 ---------
 
+20.1 - *unreleased*
+~~~~~~~~~~~~~~~~~~~
+
+No changes yet.
+
 20.0 - 2020-01-06
 ~~~~~~~~~~~~~~~~~
 
diff --git a/packaging/__about__.py b/packaging/__about__.py
index 26947283..e72680ad 100644
--- a/packaging/__about__.py
+++ b/packaging/__about__.py
@@ -18,7 +18,7 @@
 __summary__ = "Core utilities for Python packages"
 __uri__ = "https://github.com/pypa/packaging"
 
-__version__ = "20.0"
+__version__ = "20.1.dev0"
 
 __author__ = "Donald Stufft and individual contributors"
 __email__ = "donald@stufft.io"