2.34.2 (2026-05-14)
- Moved
headersinput type back toMappingto avoid invariance issues withMutableMappingand inferred dict types. Users callingRequest.headers.update()may need to narrow typing in their code. (#7441)
Full Changelog: https://github.com/psf/requests/blob/main/HISTORY.md#2342-2026-05-14