# Migration from v2.x to v3.x

This guide describes how to migrate from `fastify-decorators` v2 to v3.

_Note_: migration guide from v1.x to v2.x is [here](https://github.com/L2jLiga/fastify-decorators/blob/v2/lib/docs/Migration-to-v2.md).

### Fastify v3 and TypeScript support

`fastify-decorators` was updated to use Fastify 3 and it brings several breaking changes in typings. For more details see [`Changed TypeScript support`] section in Fastify V3 Migration Guide.

[`changed typescript support`]: https://github.com/fastify/fastify/blob/master/docs/Migration-Guide-V3.md#changed-typescript-support