ReadyAPI Protection License server version upgrade to 5.4.3 Question

Hello,

We are planning to upgrade the ReadyAPI license version to 5.4.3. This is our first time Protection license server upgrade after we set up the server initially early this year. 

Question here is Do you guys upgrade the license server version on "Test Server" first and after it is successful, push the upgrade to Production Server?

Or directly upgrade the Production License server?

Just would like to know how you guys are doing in your organizations?

Thanks!