diff --git a/CHANGES.rst b/CHANGES.rst
index d18a166..8036304 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+5.5.4 (unreleased)
+------------------
+
+- Nothing changed yet.
+
+
 5.5.3 (2024-09-23)
 ------------------
 
diff --git a/setup.py b/setup.py
index 384b763..f97cd40 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@
 
 setup(
     name="redturtle.volto",
-    version="5.5.3",
+    version="5.5.4.dev0",
     description="Helper package to setup a RedTurtle's Plone site ready to work with Volto.",
     long_description=long_description,
     # Get more from https://pypi.org/classifiers/