Hi all, We just released Sphinx-3.0.0b1. It has many changes including incompatible ones. Please confirm it working fine on your documents. In detail, please see CHANGES: https://github.com/sphinx-doc/sphinx/blob/3.0.x/CHANGES You can use it with: pip install --pre Sphinx Since this is a beta release, we expect that you may encounter bugs. If you find a bug, please file an issue on Github issues: https://github.com/sphinx-doc/sphinx/issues Thanks, Takeshi KOMIYA