express changelog & breaking changes

v4.22.2

2026-05-11

No breaking-change keywords detected in release notes.

2025-12-01

No breaking-change keywords detected in release notes.

2025-12-01

⚠ Potential breaking changes

chore: remove duplicate word by @dufucun in https://github.com/expressjs/express/pull/6456
add deprecation warnings for redirect arguments undefined by @bjohansebas in https://github.com/expressjs/express/pull/6405
lib: use req.socket over deprecated req.connection by @bjohansebas in https://github.com/expressjs/express/pull/6705
Remove history.md from being packaged on publish by @sheplu in https://github.com/expressjs/express/pull/6780

2025-12-01

No breaking-change keywords detected in release notes.

2025-12-01

No breaking-change keywords detected in release notes.

2024-10-08

⚠ Potential breaking changes

remove --bail from test script by @jonchurch in https://github.com/expressjs/express/pull/5962

2025-03-31

⚠ Potential breaking changes

Remove Object.setPrototypeOf polyfill by @Phillip9587 in https://github.com/expressjs/express/pull/6081
cleanup: remove promise support check from tests by @Phillip9587 in https://github.com/expressjs/express/pull/6148
cleanup: remove unnecessary require for global Buffer by @Phillip9587 in https://github.com/expressjs/express/pull/6146
cleanup: remove AsyncLocalStorage check by @Phillip9587 in https://github.com/expressjs/express/pull/6147
Remove `utils-merge` dependency - use spread syntax instead by @Phillip9587 in https://github.com/expressjs/express/pull/6091
fix: remove download size badges by @wesleytodd in https://github.com/expressjs/express/pull/6266
Remove unused `depd` dependency by @jonkoops in https://github.com/expressjs/express/pull/6197
doc: remove @mertcanaltin from Triagers by @mertcanaltin in https://github.com/expressjs/express/pull/6408

2024-12-05

No breaking-change keywords detected in release notes.