# Support for now\.json will be removed on March 31, 2026

**Published:** February 23, 2026 | **Authors:** Tom Knickman

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Support for the legacy `now.json` config file will be officially removed on **March 31st, 2026**. Migrate existing `now.json` files by renaming them to `vercel.json,` no other content changes are required.

For more advanced use cases, try [vercel.ts](https://vercel.com/changelog/vercel-ts) for programmatic project configuration.

Learn more about configuring projects with `vercel.json` in the [documentation](https://vercel.com/docs/project-configuration#file-based-configuration).

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📚 **More updates:** [View all changelog entries](/changelog/sitemap.md) | [Blog](/blog/sitemap.md)