npm update to specific version (and shrinkwrap)

I'm using NPM and shrinkwrap (latest up to date version) to maintain my packages.

At the moment, one of my package current version is 1.1.0. The latest version of this package is 2.2.0.

I want to update/upgrade this specific package to version 2.0.0 (and not the latest 2.2.0).

I thought that the procedure would be:

1. npm install in order to make sure that I'm synchronized with the npm-shrinkwrap
2. npm update myPackage@2.0.0
3. npm shrinkwrap
4. git add . && git commit -m "Updating package myPackage to version 2.0.0"

This doesn't seem to be the right road to go. It doesn't update the package.json and it always jump to the latest version. I have no control over this command to select the specific version I want.

I read the documentation about npm update and couldn't find the proper way to update the package to a specific version.

How to do this ? Would npm install --save myPackage@2.0.0 would be the correct procedure ? Then what will be the purpose of having npm update command ?

via Yves L L