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Version 0.52.0 (#3044)
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docs/release-notes.md

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## 0.52.0 (July 29, 2026)
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This release adds an experimental HTTP/1.1 implementation backed by [zttp](https://zttp.marcelotryle.com/), a sans-IO HTTP parser I've been developing on the side: a core written in Zig, with bindings to Python. It has been running under a fuzzer for some weeks now, and has been through multiple rounds of security auditing.
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It is still **experimental**, so don't put it in front of production traffic yet. Try it with `--http zttp`, and please send any feedback to the [issue tracker](https://github.com/Kludex/uvicorn/issues).
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### Added
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* Add an experimental `zttp` HTTP/1.1 implementation, selectable with `--http zttp` (#2979)
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### Fixed
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* Keep non-ASCII WebSocket request headers intact with websockets 17.0, which encodes them with ISO-8859-1 (#3036)
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## 0.51.0 (July 8, 2026)
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### Added

uvicorn/__init__.py

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from uvicorn.config import Config
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from uvicorn.main import Server, main, run
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__version__ = "0.51.0"
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__version__ = "0.52.0"
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__all__ = ["main", "run", "Config", "Server"]

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