On CentOS 7 you can do the following:
sudo npm cache clean -f
sudo npm install -g n
sudo n stable
sudo ln -sf /usr/local/n/versions/node/5.4.1/bin/node /usr/bin/node
node –v (Should show updated version now)
npm rebuild node-sass (Optional: if you use this)
Note: The symlink is required to link your node binary with the latest Node.js installed binary file.