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MESH-2092 Bump uvicorn from 0.52.4 to 0.53.0 in the patch-and-minor group - #378

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Sep 22, 2026
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Bumps the patch-and-minor group with 1 update: uvicorn.

Updates uvicorn from 0.52.4 to 0.53.0

Release notes

Sourced from uvicorn's releases.

Version 0.53.0

🌐 Opt-in HTTP/2 support

uvicorn 0.53.0 adds experimental HTTP/2 through zttp, alongside a new zuvloop integration and connection-handling improvements.

uv add uvicorn==0.53.0
  • Serve HTTP/1.1 and HTTP/2 with zttp (#2982, #3101). Install zttp, then enable HTTP/2 with --http zttp --http2. Uvicorn negotiates HTTP/2 over TLS with ALPN and supports cleartext prior knowledge.
  • HTTP/2 remains experimental. Upgrade-based h2c and WebSockets over HTTP/2 are not supported.

⚙️ More event loop choice

  • Run Uvicorn with zuvloop (#3104). Install zuvloop separately and select it explicitly with --loop zuvloop on CPython 3.14 or newer.

🛡️ More reliable connections and proxies

  • Honor Connection: close token lists (#3103). Uvicorn now parses comma-separated tokens case-insensitively across HTTP implementations.
  • Trust IPv6 loopback proxies by default (#3119). The default FORWARDED_ALLOW_IPS value now includes ::1.
  • Keep upgraded WebSockets alive (#3107). Uvicorn cancels the HTTP keep-alive timer when the connection becomes a WebSocket.

Full changelog: 0.52.4...0.53.0

Changelog

Sourced from uvicorn's changelog.

0.53.0 (September 14, 2026)

This release adds experimental HTTP/2 support through zttp. Enable it with --http zttp --http2. Upgrade-based h2c and WebSockets over HTTP/2 are not supported.

Added

  • Add experimental HTTP/2 support through zttp (#2982, #3101)
  • Add support for zuvloop (#3104)

Fixed

  • Handle comma-separated, case-insensitive Connection: close tokens across HTTP implementations (#3103)
  • Trust IPv6 loopback in the default FORWARDED_ALLOW_IPS value (#3119)
  • Cancel the HTTP keep-alive timer when upgrading to WebSocket (#3107)
Commits
  • 421708f Version 0.53.0 (#3136)
  • f1a1bff Unset the keep-alive timer when upgrading to WebSocket (#3107)
  • 63971ed Document HTTP/2 support (#3130)
  • 7d1a005 Remove race from multiprocess health check test (#3128)
  • 5ac6265 Add ::1 to FORWARDED_ALLOW_IPS (#3119)
  • 098b206 Remove timing race from SIGHUP supervisor test (#3127)
  • 968f15e chore(deps): bump the github-actions group with 4 updates (#3113)
  • 7d4c08c chore(deps): bump the python-packages group across 1 directory with 11 update...
  • fe528a4 Require explicit opt-in for zttp HTTP/2 (#3101)
  • fa324a4 chore(deps-dev): bump httpx2 from 2.10.0 to 2.12.0 (#3121)
  • Additional commits viewable in compare view

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Bumps the patch-and-minor group with 1 update: [uvicorn](https://github.com/Kludex/uvicorn).


Updates `uvicorn` from 0.52.4 to 0.53.0
- [Release notes](https://github.com/Kludex/uvicorn/releases)
- [Changelog](https://github.com/Kludex/uvicorn/blob/main/docs/release-notes.md)
- [Commits](Kludex/uvicorn@0.52.4...0.53.0)

---
updated-dependencies:
- dependency-name: uvicorn
  dependency-version: 0.53.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: patch-and-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file python Pull requests that update python code labels Sep 22, 2026
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shared-merge-writeback Bot enabled auto-merge (squash) September 22, 2026 03:35
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☂️ Code Coverage

current status: ✅

Overall Coverage

Statements Covered Coverage Threshold Status
2931 2719 93% 85% 🟢

New Files

No new covered files...

Modified Files

No covered modified files...

updated for commit: 74cdfae by action🐍

@sonarqubecloud

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@shared-merge-writeback
shared-merge-writeback Bot merged commit cadeb1b into develop Sep 22, 2026
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@shared-merge-writeback
shared-merge-writeback Bot deleted the dependabot/pip/patch-and-minor-9e07ed4e02 branch September 22, 2026 03:37
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