# Upgrading from 5.x to 6.0

> You can find a complete list in [Changelog](https://github.com/dotkernel/api/blob/6.0/CHANGELOG.md)

* Move common logic to Core module [https://github.com/dotkernel/api/pull/358](https://github.com/dotkernel/api/pull/358)
* Refactored Handlers [https://github.com/dotkernel/api/pull/385](https://github.com/dotkernel/api/pull/385)
* Inject `InputFilters` in handlers [https://github.com/dotkernel/api/pull/389](https://github.com/dotkernel/api/pull/389)
* Implemented route grouping [https://github.com/dotkernel/api/pull/391](https://github.com/dotkernel/api/pull/391)
* Service refactoring [https://github.com/dotkernel/api/pull/396](https://github.com/dotkernel/api/pull/396)
* Autogenerate `OAuth2` keys when cloning the project [https://github.com/dotkernel/api/pull/398](https://github.com/dotkernel/api/pull/398)
* Refresh Postman documentation [https://github.com/dotkernel/api/pull/400](https://github.com/dotkernel/api/pull/400)
* Merge `Admin.Core` into `API.Core` [https://github.com/dotkernel/api/pull/401](https://github.com/dotkernel/api/pull/401)
* Implemented `mezzio/mezzio-problem-details` [https://github.com/dotkernel/api/pull/402](https://github.com/dotkernel/api/pull/402)
* Update pre-run.sh [https://github.com/dotkernel/api/pull/404](https://github.com/dotkernel/api/pull/404)
* Update `GetIndexResourceHandler.php` [https://github.com/dotkernel/api/pull/408](https://github.com/dotkernel/api/pull/408)
* Update `local.php.dist` [https://github.com/dotkernel/api/pull/409](https://github.com/dotkernel/api/pull/409)
* Fixed error handling [https://github.com/dotkernel/api/pull/412](https://github.com/dotkernel/api/pull/412)
* Implemented `ResourceProviderMiddleware` and added `ResourceGuardInterface` [https://github.com/dotkernel/api/pull/403](https://github.com/dotkernel/api/pull/403)
* Updated logic in `ContentNegotiationMiddleware` [https://github.com/dotkernel/api/pull/413](https://github.com/dotkernel/api/pull/413)
* `AuthenticationMiddleware` no longer extends `AuthenticationMiddleware` from `mezzio/mezzio-authentication` [https://github.com/dotkernel/api/pull/418](https://github.com/dotkernel/api/pull/418)
* Update `qodana_code_quality.yml` [https://github.com/dotkernel/api/pull/416](https://github.com/dotkernel/api/pull/416)
* Replaced `Twig` with custom templating solution [https://github.com/dotkernel/api/pull/419](https://github.com/dotkernel/api/pull/419)
* Increased `PHPStan` level to 8 [https://github.com/dotkernel/api/pull/421](https://github.com/dotkernel/api/pull/421)
* Split the `/security/token` endpoint into two separate endpoints [https://github.com/dotkernel/api/pull/423](https://github.com/dotkernel/api/pull/423)