diff --git a/CHANGES.rst b/CHANGES.rst
index d0ab034..6921ad7 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog of dask-geomodeling
 ===================================================
 
+2.5.2 (unreleased)
+------------------
+
+- Nothing changed yet.
+
+
 2.5.1 (2024-09-30)
 ------------------
 
diff --git a/setup.py b/setup.py
index 0cbe4cc..124f892 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup
 import os
 
-version = '2.5.1'
+version = '2.5.2.dev0'
 
 long_description = "\n\n".join([open("README.rst").read(), open("CHANGES.rst").read()])