[dependabot]

Bumps uvicorn[standard] from 0.53.0 to 0.54.0.

Release notes

Sourced from uvicorn[standard]'s releases.

Version 0.54.0

📨 Send metadata after the response body

uvicorn 0.54.0 adds response trailers and 103 Early Hints to its experimental HTTP/2 implementation through zttp.

uv add uvicorn==0.54.0 "zttp>=0.0.34"

• Send HTTP/2 response trailers (#3146). The ASGI http.response.trailers extension lets applications send metadata, such as checksums, after the response body. Clients must send TE: trailers to receive them. Multiple trailer messages are combined before completing the response.
• HTTP/2 remains experimental and opt-in. Enable it with --http zttp --http2. Upgrade-based h2c and WebSockets over HTTP/2 remain unsupported.

💡 Hint at resources before the final response

• Send 103 Early Hints over HTTP/2 (#3137). Applications can use the ASGI http.response.early_hint extension to send resource hints before the final response. Each supplied link becomes a separate Link header.

Full changelog: 0.53.0...0.54.0

Changelog

Sourced from uvicorn[standard]'s changelog.

0.54.0 (September 24, 2026)

HTTP/2 support remains experimental. Install zttp>=0.0.34 and enable it with --http zttp --http2.

Added

• Add HTTP/2 response trailers through the ASGI http.response.trailers extension. Clients must send TE: trailers to receive them (#3146)
• Add HTTP/2 103 Early Hints through the ASGI http.response.early_hint extension (#3137)

Commits

• 3eb9a9a Version 0.54.0 (#3161)
• cd7ef6d Remove races from supervisor tests (#3134)
• a56c7cc Support HTTP/2 response trailers (#3146)
• 9bd4404 chore(deps): bump anyio from 4.13.0 to 4.14.2 (#3145)
• 21f39ef Add HTTP/2 Early Hints support (#3137)
• See full diff in compare view

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[tom-sapletta-com]

@dependabot rebase

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[ifuri-validator-agent]

Validator approval after policy checks for exact head 1616b412b745165a21fa7d8441bd4bd3bd9af364.

Ticket: ticket-621
Correlation ID: fleet-21
Model: gemini/gemini-3.8-flash
Reviewed diff chunks: 1
Advisory LLM verdict: APPROVE
Advisory summary: Reviewed all 1 diff chunk(s). Dependency update bumps uvicorn[standard] from 0.53.0 to 0.54.0 with matching project tracking and intent files. All required CI and governance checks have passed.
Advisory findings: none
The LLM output above is advisory and was not used as the approval trust root.
Semantic review prerequisite: not_required; policy 676cb4516bbfed2a000e40b9b1b6e4a430ecc761ec546aeb53d721a1905cfdd7.

Actual PR impact radar

Exact range: e29b65bd5eeb9c7bddcb29dab8043f8eb1ba212c...1616b412b745165a21fa7d8441bd4bd3bd9af364
Change digest: 7c2ef54e3c78cd3b5933d2a8ed8835249047289b28cc79887915f1fc1c439d63
Score: 84/100 (L), estimated 139 min, split recommended: true
Affected services/components: repository-wide/unclassified

Machine-readable radar JSONL and SVG

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Merge will be attempted after this approval when explicitly authorized. ## Decision record (recomputable)

DECISION D-621-7073
TICKET ticket-621
HEAD_SHA 1616b412b745165a21fa7d8441bd4bd3bd9af364
CORRELATION_ID fleet-21
ACTOR agent:ifuri-validator-agent[bot]
APPLIED_RULE P-CORE-015
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VERDICT APPROVE AUTHORITY DETERMINISTIC
REJECTED REQUEST_CHANGES BECAUSE NO_UNSAFE_CHANGE_REASON_FOUND
ADVISORY llm_verdict = "APPROVE" MODEL "gemini/gemini-3.8-flash"
ASSERT VERDICT_AUTHORITY != "ADVISORY"