Composer: how can I install another dependency without updating old ones?

Question

I have a project with a few dependencies and I\'d like to install another one, but I\'d like to keep the others the way they are. So I\'ve edited the composer.json

Answer 1

My use case is simpler, and fits simply your title but not your further detail.

That is, I want to install a new package which is not yet in my composer.json without updating all the other packages.

The solution here is composer require x/y