Gateway Upgrade to newer version

Hello,
I’ve have more than 50+ Ignition Gateways which I want to upgrade from 8.1.13 to 8.1.18. Is there any way that I could upgrade all the gateway at once instead of upgrading one by one? I read that this is possible through EAM, but don’t know where to start. Any help from the community would be highly appreciated.

Thanks.