diff --git a/CHANGES.rst b/CHANGES.rst
index 9c20d97a..2598a547 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+6.0.21 (unreleased)
+-------------------
+
+- Nothing changed yet.
+
+
 6.0.20 (2023-10-30)
 -------------------
 
diff --git a/setup.py b/setup.py
index c4670286..2b86a6ea 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@
 
 setup(
     name="design.plone.contenttypes",
-    version="6.0.20",
+    version="6.0.21.dev0",
     description="DesignItalia contenty types",
     long_description=long_description,
     long_description_content_type="text/markdown",