diff --git a/CHANGES.md b/CHANGES.md
index 3d418a32..e2e3a5d5 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,9 @@
+2.3.0 (development)
+===================
+
+TODO
+
+
 2.2.1
 =====
 
diff --git a/cloudpickle/__init__.py b/cloudpickle/__init__.py
index ad9f3b29..48f8993f 100644
--- a/cloudpickle/__init__.py
+++ b/cloudpickle/__init__.py
@@ -5,4 +5,4 @@
 # expose their Pickler subclass at top-level under the  "Pickler" name.
 Pickler = CloudPickler
 
-__version__ = '2.2.1'
+__version__ = '2.3.0.dev0'