# What changed in @fastify/etag

> 2 changes in @fastify/etag 6 from its official release notes, upgrade guides and advisories: 1 new APIs and options. Each one cited. Sources checked 2026-10-19. HTML: https://unstale.sh/npm/@fastify/etag/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## @fastify/etag 6

### New APIs and options

- Supports a custom hash function for generating ETags. (6.2.0) — [release notes](https://github.com/fastify/fastify-etag/releases/tag/v6.2.0)

### Fixes and other changes

- Sending a 304 response now returns null. (6.2.1) — [release notes](https://github.com/fastify/fastify-etag/releases/tag/v6.2.1)