diff --git a/cherry_picker/cherry_picker/__init__.py b/cherry_picker/cherry_picker/__init__.py
index 8fd5d24..ff9e87e 100644
--- a/cherry_picker/cherry_picker/__init__.py
+++ b/cherry_picker/cherry_picker/__init__.py
@@ -1,2 +1,2 @@
 """Backport CPython changes from master to maintenance branches."""
-__version__ = '1.3.0'
+__version__ = '1.3.1.dev1'
diff --git a/cherry_picker/readme.rst b/cherry_picker/readme.rst
index f13747d..b63923b 100644
--- a/cherry_picker/readme.rst
+++ b/cherry_picker/readme.rst
@@ -335,6 +335,9 @@ in the directory where ``pyproject.toml`` exists::
 Changelog
 =========
 
+1.3.1 (in development)
+----------------------
+
 1.3.0
 -----