# Flags SDK 4.0.4

- Product: Flags SDK (https://whatsnew.fyi/product/flags-sdk)
- Vendor: Vercel
- Date: 2026-03-09
- Version: 4.0.4
- Original notes: https://github.com/vercel/flags/releases/tag/flags%404.0.4
- Permalink: https://whatsnew.fyi/product/flags-sdk/releases/4.0.4

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'.

---

- **fixed** — Handle when an app goes from precomputing one or more flags to precomputing none by using __no_flags__ as the serialized value so the app will still rewrite and prerender the page

###### Patch Changes

-   77727aa: The Flags SDK now handles when an app goes from precomputing one or more flags to precomputing none.

    In this case we use `__no_flags__` as the serialized value so the app will still rewrite and prerender the page.

    `precompute`, `generatePermutations`, `serialize` and `deserialize` were adjusted to generate and parse `__no_flags__` correctly.