A new version of Adobe’s free PDF document viewer, Acrobat Reader DC, was released on March 17.

According to the release announcement, Reader 20.006.20042 addresses thirteen security vulnerabilities in earlier versions. Many of these bugs were detected and reported by third-party researchers, who are credited in the announcement.

If you use Reader, and particularly if you use it to open PDF files you obtain from email and the web, you should make sure it’s up to date.

Newer versions of Reader typically update themselves when they detect new versions, but since it’s not clear what triggers these updates, you might want to check your version and update it yourself.

Check the version of your Reader by navigating its menu to Help > About Adobe Acrobat Reader DC... If you’re not running the latest version, update it via Help > Check for Updates...