How to search and replace multiple values in an array using jq?

In the following json file, { "contacts": [ { "name": "John", "phone": "1234" }, { "name": "Jane", "phone": "5678" } ] } I need to update both phone numbers based on the name and store the whole json in a new file. I tried stuff like: jq '.contacts[] | select(.name == "John") | .phone = "4321"' updated_contacts.json But then I don't know how to go back to the parent node and change Jane's one, nor retrieve the whole json. I tried to store to root node in a variable with as, but it keeps unchanged. As a temporary workaround I'm just doing this: jq '.contacts.number = "4321" | .contacts.number = "4321"' updated_contacts.json But I should not rely on array indexes, but names, as the original json may change. Any idea how could I do it using jq command?