Hosted WP Engine - Upgrade Woocommerce from 2.5.5 to atleast 3.9+. Needed for new Plugin

We need to upgrade woocommerce, Wordpress had already been upgraded. This is needed for a plugin for checkout to work. This site has been up for years and is in production. Wordpress is on 5.9.2 and Woocommerce is on 2.5.5 and documentation says to go to minimum 3.9 for checkout plugin. Hosted with WPengine