diff --git a/CHANGES.rst b/CHANGES.rst
index 937b40e..0a3e4a2 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog of dask-geomodeling
 ===================================================
 
+2.5.5 (unreleased)
+------------------
+
+- Nothing changed yet.
+
+
 2.5.4 (2024-10-28)
 ------------------
 
diff --git a/setup.py b/setup.py
index 4a59920..7027025 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup
 import os
 
-version = '2.5.4'
+version = '2.5.5.dev0'
 
 long_description = "\n\n".join([open("README.rst").read(), open("CHANGES.rst").read()])