# Development open for Swift 6.4.3 for Non-Darwin Platforms

**URL:** <https://forums.swift.org/t/development-open-for-swift-6-4-3-for-non-darwin-platforms/90403>\
**Category:** Announcements\
**Created:** [November 3, 2026, 8:19am UTC](https://forums.swift.org/t/development-open-for-swift-6-4-3-for-non-darwin-platforms/90403 "2026-11-03T08:19:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mishal\_shah](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/mishal_shah/32/247_2.png) [@mishal\_shah](https://forums.swift.org/u/mishal_shah)\
**Post date:** [November 3, 2026, 8:19am UTC](https://forums.swift.org/t/development-open-for-swift-6-4-3-for-non-darwin-platforms/90403/1 "2026-11-03T08:19:32Z")

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We are happy to announce the opening of the development phase for Swift 6.4.3.

- Merge window open: Now
- Merge window close: Nov 17th 2026
- Planned release: End of Nov 2026
- Release manager: [@mishal\_shah](https://forums.swift.org/u/mishal_shah) ([shahmishal](https://github.com/shahmishal) on GitHub)
- [Process documentation](https://www.swift.org/documentation/monthly-non-darwin-release/)
- Changes for Swift version 6.4.3 should be made on the `release/6.4.3` branch.
  - If you recently made changes to `release/6.4.x` after September 11th, they won’t be included in `release/6.4.3` unless you cherry-picked them into `release/6.4.2`.