# Uvicorn 0.52.3 — Version 0.52.3

- Product: Uvicorn (https://whatsnew.fyi/product/uvicorn)
- Vendor: Encode
- Date: 2026-08-13
- Version: 0.52.3
- Original notes: https://github.com/Kludex/uvicorn/releases/tag/0.52.3
- Permalink: https://whatsnew.fyi/product/uvicorn/releases/0.52.3

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Update zttp to 0.0.24 and use its combined receive path, improving HTTP/1.1 request parsing performance

###### Changed

* Update `zttp` to 0.0.24 and use its combined receive path, improving HTTP/1.1 request parsing performance (#3067)

**Full Changelog**: https://github.com/Kludex/uvicorn/compare/0.52.2...0.52.3