Upgrading Splunk Universal Forwarder from 6.4.3 to 7.2.1

Hi. We are running Splunk Enterprise 6.4.3, and our Universal Forwarders are running the same version. We'll be upgrading to Splunk Enterprise to 7.2.1, which I understand involves a hop to 6.5, then an upgrade to 7.1.x. We want to upgrade our Universal Forwarders as well. Does upgrading the forwarders from 6.4.3 -> 7.1.x also require the extra hop? Or can they go from straight from 6.4.3 to 7.2.1? Thanks!