diff --git a/CHANGES.rst b/CHANGES.rst
index d2befaf..520ef04 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+2.1 (unreleased)
+----------------
+
+- Nothing changed yet.
+
+
 2.0 (2023-03-27)
 ----------------
 
diff --git a/setup.py b/setup.py
index 7e9eeee..d3f5f05 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 from setuptools import setup
 
 
-version = '2.0'
+version = '2.1.dev0'
 
 readme = open('README.rst').read()
 changes = open('CHANGES.rst').read()