The last supported version for node 4 is `1.143.6`
You can install it by doing `npm i -g email@example.com`
On 30th of April, 2018, Node.js 4 was officially marked as End of Life (EOL) and ceased to receive security updates.
We highly recommend that you follow a migration path to a stable and officially supported version of Node.js to be able to receive bug and security fixes. You’ll want to upgrade your version to at least Node.js 6.5.0 Boron (although we recommend 10 Dubnium, the current LTS!)