Johannes Rieke updated Python version support for the streamlit/docs repository, focusing on aligning documentation and Dockerfiles with current runtime requirements. He removed references to Python 3.9 and introduced support for Python 3.14, ensuring compatibility with upcoming features that depend on newer language capabilities. The technical approach involved modifying Dockerfiles to use the 3.12-slim base image and updating Markdown documentation for accuracy and consistency. Using Docker, Python, and Markdown, Johannes improved the clarity of supported versions and runtime expectations. The work was limited in scope but addressed an essential maintenance need, laying groundwork for future development and streamlined support.