diff --git a/CHANGES.rst b/CHANGES.rst
index 608b8e98..9803a286 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+6.3.1 (unreleased)
+------------------
+
+- Nothing changed yet.
+
+
 6.3.0 (2024-12-05)
 ------------------
 
diff --git a/setup.py b/setup.py
index 0e7f9557..d51c8b9c 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@
 
 setup(
     name="design.plone.contenttypes",
-    version="6.3.0",
+    version="6.3.1.dev0",
     description="DesignItalia contenty types",
     long_description=long_description,
     long_description_content_type="text/markdown",