To download the FortiGate VM deployment package: In the main page of the Customer Service & Support site, select Download > Firmware Images. The Firmware Images page opens.; In the Firmware Images page, select FortiGate.
To download firmware. Log into the site using your user name and password. Go to Download > Firmware Images. A list of Release Notes is shown. If you have not already done so, download and review the Release Notes for the firmware you wish to upgrade your FortiGate unit to. Select HTTPS Download.