`yarn upgrade` does not update package.json | SOLUTION

I had to update some NPM packages. In our team we use https://depfu.com which informs us about outdated packages.

I wanted to update some packages manually and I found that it’s not so easy.

The command:

yarn upgrade react react-dom jest-dom css-loader 

Just updated yarn.lock but didn’t update package.json

I went to official docs: https://yarnpkg.com/lang/en/docs/cli/upgrade

and didn’t find any option to reach my goal

I went to the ticket https://github.com/yarnpkg/yarn/issues/2042

and didn’t find a way to reach my goal again.

Finally I tried

yarn upgrade react react-dom jest-dom css-loader
yarn add react react-dom jest-dom css-loader

In this case first command updates yarn.lock and the second one package.json

Enjoy with development!