# Terra Functional Testing - Version 3 Upgrade Guide

To upgrade to `terra-functional-testing` from v2 to v3, consumers will need to update `webpack` to v5  and `webpack-dev-server` to v4 and make any additional changes necessary as part of the migration. Refer to the Resources section for more information.

## Breaking Changes

The only breaking change with this major version is the `webpack-dev-server` upgrade to v4. To know more about breaking changes of `webpack-dev-server` version 4, refer to the Resources section.

## Resources

- [Migrating to Webpack v5](https://webpack.js.org/migrate/5/)
- [Webpack-dev-server breaking changes](https://github.com/webpack/webpack-dev-server/blob/master/migration-v4.md#migration-guide)