# Next.js v16.3.1

- Product: Next.js (https://whatsnew.fyi/product/next-js)
- Vendor: Vercel
- Date: 2026-08-13
- Version: v16.3.1
- Original notes: https://github.com/vercel/next.js/releases/tag/v16.3.1
- Permalink: https://whatsnew.fyi/product/next-js/releases/v16.3.1

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** — Turbopack: don't strip async-module runtime from shared runtime chunks
- **changed** — Turbopack: add turbopack_ecmascript and turbopack_wasm's embedded FS to internal_assets_conditions
- **changed** — Turbopack: collapse nested promises in the analyzer
- **fixed** — Preserve image response after optimization in next/image
- **fixed** — Fix missing styled-jsx styles in Pages Router SSR on adapter builds
- **fixed** — Turbopack: fix HMR for dynamic imports evaluated from layouts
- **fixed** — Restore the live headers() view of the incoming request
- **changed** — Allow literal exports in 'use cache' files
- **fixed** — Keep the dev validation worker alive across HMR updates
- **fixed** — Discard only cache entries that predate a tag revalidation, and reuse completed entries
- **fixed** — Encode the cache item name built by unstable_cache
- **fixed** — Fix Nav Inspector request loop on repeat captures
- **fixed** — Fix optimistic routing bugs leading to repeated prefetch loops
- **changed** — Retain fewer stale cache versions and use a TTL, plus the mtime fallback
- **fixed** — Revert i18n localization change for dynamic Pages API routes

##### What's Changed
* [16.x] Turbopack: don't strip async-module runtime from shared runtime chunks by @lukesandberg in https://github.com/vercel/next.js/pull/96653
* [16.x] [turbopack] Add `turbopack_ecmascript` and `turbopack_wasm`'s embeded FS to `internal_assets_conditions` by @lukesandberg in https://github.com/vercel/next.js/pull/96655
* [16.x] [turbopack] Collapse nested promises in the analyzer by @sampoder in https://github.com/vercel/next.js/pull/96675
* [16.x] fix(next/image): preserve image response after optimization by @styfle in https://github.com/vercel/next.js/pull/96733
* [16.3.x] Default deploy e2e tests to the repo next version by @eps1lon in https://github.com/vercel/next.js/pull/96900
* [backport] Bump @swc/helpers by @mischnic in https://github.com/vercel/next.js/pull/96885
* [backport] [turbopack] Raise registration calls in hoisted modules to the top by @lukesandberg in https://github.com/vercel/next.js/pull/97308
* [backport] Fix missing styled-jsx styles in Pages Router SSR on adapter builds by @lukesandberg in https://github.com/vercel/next.js/pull/97302
* [backport] [turbopack] Fix HMR for dynamic imports evaluated from layouts by @lukesandberg in https://github.com/vercel/next.js/pull/97317
* [backport] Restore the live `headers()` view of the incoming request by @unstubbable in https://github.com/vercel/next.js/pull/97311
* [backport] Allow literal exports in `'use cache'` files by @unstubbable in https://github.com/vercel/next.js/pull/97312
* [backport] Keep the dev validation worker alive across HMR updates by @unstubbable in https://github.com/vercel/next.js/pull/97315
* [backport] Discard only cache entries that predate a tag revalidation, and reuse completed entries by @unstubbable in https://github.com/vercel/next.js/pull/97314
* [backport] Encode the cache item name built by `unstable_cache` by @unstubbable in https://github.com/vercel/next.js/pull/97313
* [16.3] [ci] Use OIDC tokens to read private preview builds by @eps1lon in https://github.com/vercel/next.js/pull/97258
* [backport] [test] Compile the middleware redirect routes up front in dev by @lukesandberg in https://github.com/vercel/next.js/pull/97328
* [backport] Fix Nav Inspector request loop on repeat captures by @acdlite in https://github.com/vercel/next.js/pull/97326
* [backport] Fix: Optimistic routing bugs leading to repeated prefetch loops by @acdlite in https://github.com/vercel/next.js/pull/97325
* [backport] Retain fewer stale cache versions and use a TTL, plus the mtime fallback by @lukesandberg in https://github.com/vercel/next.js/pull/97304
* [backport] Revert i18n localization change for dynamic Pages API routes (#94905) by @gaojude in https://github.com/vercel/next.js/pull/97330


**Full Changelog**: https://github.com/vercel/next.js/compare/v16.3.0...v16.3.1