# Fastify v5.11.0

- Product: Fastify (https://whatsnew.fyi/product/fastify)
- Vendor: Fastify
- Date: 2026-07-30
- Version: v5.11.0
- Original notes: https://github.com/fastify/fastify/releases/tag/v5.11.0
- Permalink: https://whatsnew.fyi/product/fastify/releases/v5.11.0

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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- **fixed** — Normalize method in findRoute
- **added** — RFC 10008 HTTP query method support
- **changed** — Reuse cached content types for response serialization
- **fixed** — Correctly update falsy values from validator
- **fixed** — Uncatchable throws in writeHead when using async hook
- **fixed** — Honor quoted-string in Content-Type parameter values

##### What's Changed
* chore: Bump markdownlint-cli2 from 0.22.1 to 0.23.0 by @dependabot[bot] in https://github.com/fastify/fastify/pull/6839
* fix: normalize method in findRoute by @Ram-blip in https://github.com/fastify/fastify/pull/6838
* docs: fix incorrect description for validateInput in Request.md by @thePranav-kpk in https://github.com/fastify/fastify/pull/6823
* feat: rfc10008 http query method by @climba03003 in https://github.com/fastify/fastify/pull/6832
* perf: reuse cached content types for response serialization by @gurgunday in https://github.com/fastify/fastify/pull/6854
* chore(sponsor): add n-ix by @Eomm in https://github.com/fastify/fastify/pull/6852
* ci: pin actions to commit-hash by @Fdawgs in https://github.com/fastify/fastify/pull/6853
* ci(dependabot): temporarily ignore typescript updates by @Tony133 in https://github.com/fastify/fastify/pull/6869
* style(types): enforce max line length by @jean-michelet in https://github.com/fastify/fastify/pull/6864
* docs(ecosystem): update fastify-prisma repo URL by @zrosenbauer in https://github.com/fastify/fastify/pull/6724
* docs(getting-started): align import with exported routes by @Solaris-star in https://github.com/fastify/fastify/pull/6859
* docs(server): fix contradictory requestIdHeader default by @sobol-sudo in https://github.com/fastify/fastify/pull/6872
* fix(validation): correctly update falsy values from validator by @jackjin1997 in https://github.com/fastify/fastify/pull/6483
* docs: specific warning suppression by @jean-michelet in https://github.com/fastify/fastify/pull/6871
* ci(links-check): pin linkinator server root to the workspace by @aquie00t in https://github.com/fastify/fastify/pull/6877
* docs: update TypeScript docs to reference Fastify 5.x by @Sasireddy001 in https://github.com/fastify/fastify/pull/6880
* docs: use async trailer handlers in Reply examples by @Ram-blip in https://github.com/fastify/fastify/pull/6856
* docs: fix logController migration example and links by @aquie00t in https://github.com/fastify/fastify/pull/6876
* fix: uncatchable throws in writeHead when using async hook by @climba03003 in https://github.com/fastify/fastify/pull/6881
* fix: honor quoted-string in `Content-Type` parameter values by @aquie00t in https://github.com/fastify/fastify/pull/6865
* chore(.npmrc): add min-release-age by @Fdawgs in https://github.com/fastify/fastify/pull/6873
* chore: Bump actions/setup-node from 6.4.0 to 7.0.0 by @dependabot[bot] in https://github.com/fastify/fastify/pull/6866
* chore: Bump actions/labeler from 6.2.0 to 7.0.0 by @dependabot[bot] in https://github.com/fastify/fastify/pull/6867

##### New Contributors
* @Ram-blip made their first contribution in https://github.com/fastify/fastify/pull/6838
* @Solaris-star made their first contribution in https://github.com/fastify/fastify/pull/6859
* @sobol-sudo made their first contribution in https://github.com/fastify/fastify/pull/6872
* @jackjin1997 made their first contribution in https://github.com/fastify/fastify/pull/6483
* @Sasireddy001 made their first contribution in https://github.com/fastify/fastify/pull/6880

**Full Changelog**: https://github.com/fastify/fastify/compare/v5.10.0...v5.11.0