diff --git a/CHANGES.rst b/CHANGES.rst
index 2d6a1be0..923c86ce 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,6 +2,12 @@ Changelog of threedigrid-builder
 ================================
 
 
+1.22.2 (unreleased)
+-------------------
+
+- Nothing changed yet.
+
+
 1.22.1 (2025-01-16)
 -------------------
 
diff --git a/threedigrid_builder/__init__.py b/threedigrid_builder/__init__.py
index 6681f442..6b3f23fd 100644
--- a/threedigrid_builder/__init__.py
+++ b/threedigrid_builder/__init__.py
@@ -2,5 +2,5 @@
 from .exceptions import *  # NOQA
 
 # fmt: off
-__version__ = '1.22.1'
+__version__ = '1.22.2.dev0'
 # fmt: on