Yarn has the yarn upgrade command for updating your packages.
// This updates all packages with pending updates
yarn upgrade
// This is more surgical.
yarn upgrade @fortawesome/fontawesome-pro
Check out the official Yarn documentation for more information about upgrading your files.
You're All Set!
Your project will now load Version 6 and render any existing icons using our newest and freshest icons and options. Are you running into trouble? Check out our troubleshooting guide for answers to common questions about using Font Awesome on the Web.