Hi Piotr,

For all upgrades, we advise performing this first in a staging/lab environment. This way you can potentially avoid downtime on your production system. If your Cassandra/Elastic cluster has some redundancy (can cope with one node going down), then you can also do a rolling upgrade and only move to the next node if the previous node is working well after the upgrade.

Anyway, don't see any reason why you would not be able to upgrade these packages.