Official firmware must be sourced directly from the Fortinet Support Portal. Log in to the Fortinet Support Portal with your credentials. Navigate to Support > Downloads > Firmware Images under the product list.
: Skipping intermediate versions can cause configuration corruption or system failure. Use the Fortinet Upgrade Path Tool to find the recommended sequence for your specific hardware and current version. fortigate firmware download install
If you manage 50+ FortiGates, use FortiManager: Official firmware must be sourced directly from the
After the reboot, use get system status to confirm the new version is active. use FortiManager: After the reboot