Hi, in this page: https://zope.readthedocs.io/en/latest/changes.html Below the 5.4 release you can read "Add support for Python 3.10" in this page: https://zope.readthedocs.io/en/latest/news.html You can read "Added support for Python 3.9" The question is: does Zope 5.5.2 support Python 3.10 or not? Thank You, Giampiero