As with the WordPress core, keeping the theme up to date is one of the most important and easier way to keep your site secure. Since many themes are free and therefore their code is available to anyone, having the latest version will ensure you’re not prone to attacks based on known vulnerabilities.
If you downloaded a theme from the official WP repository you can easily check if there are any upgrades available, and upgrade it by opening Appearance – Themes. If you bought a plugin from ThemeForest be sure to check the theme’s page and upgrade manually. Remember – always backup your files and database before upgrading!
If you are concerned about WordPress security on your site, we encourage you to follow the full set of tips on our WordPress Security page. And get in touch if you need help with protecting your site from hackers.