vmware esxi - ILO Update : Which version should we select?

We have a HP ProLiant DL160 Gen 8 server, with VMWare ESXi 6.0.0 actually installed on it.

We started to update it to VMWare ESXi 6.5, but the upgrade stopped, stating that we need to update the HP ILO before going forward.

Our current HP ILO is 600.9.0.2.8-1OEM.600.0.0.2159203

So here is my question : Which ILO should I select ?

Thank you very much,