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urllib3 entered the "Billion-a-Month" club in 2025

Welcome to the 2025 annual report for urllib3. I’m Illia, and this is my first time writing this update for the second most downloaded Python package. Long-time readers will recognize these reports from Seth Larson or Quentin Pradet, but this year I’m taking the baton to share what we’ve been up to. 2025 was a busy year defined by security hardening and future-proofing. We released 5 versions and merged over 100 pull requests, working to secure the library and prepare it for Python 3.14. For the first time ever, urllib3 was installed over 1 billion times per month consistently throughout the last quarter, signaling new levels of adoption for both the Python language and foundational open source libraries like urllib3.

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January 20, 2026