# Flags SDK 4.1.1

- Product: Flags SDK (https://whatsnew.fyi/product/flags-sdk)
- Vendor: Vercel
- Date: 2026-06-16
- Version: 4.1.1
- Original notes: https://github.com/vercel/flags/releases/tag/flags%404.1.1
- Permalink: https://whatsnew.fyi/product/flags-sdk/releases/4.1.1

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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###### Patch Changes

-   [#399](https://github.com/vercel/flags/pull/399) [`50725a8`](https://github.com/vercel/flags/commit/50725a8dcfaca7b31d89c45c70e3e087366649da) Thanks [@dferber90](https://github.com/dferber90)! - Recognize hanging promise rejection as internal Next.js error