...In general, most upgrades won't require any migration steps to work, but if you experience problems after an upgrade, please file an issue, and we'll add it to the list of migration steps. Since 2.16.0, the template uses different tsconfig files for both development and production mode. For the latter, unfortunately, the path resolver is not smart enough to fall back to the basic tsconfig.json in case the expected tsconfig.prod.json is not present, so you have to create this file manually. Since 2.13.0, typescript is listed as a peer dependency of react-scripts-ts. For projects generated with at least this version, the init script takes care of properly installing it as dev dependency to the generated projects.