What's new in pip 26.1 - lockfiles and dependency cooldowns!

On April 26, 2026, we, the pip team, released pip 26.1. As always, please consult the changelog to learn about all of the changes contained in this release. Python 3.9 is no longer supported pip 26.1 now targets Python 3.10 and higher. Python 3.9 entered End-of-Life (EOL) status six months ago in October 2025. At this point in the year, many of pip&rsquo;s vendored dependencies have stopped…