Azure Cache for Redis 4.0 upgrade is now generally available
Updated: August 07, 2019
Redis version 4.0 will soon be rolled out to all Azure Cache for Redis instances. The update will be automatic and shouldn’t disrupt your cache’s availability. No action is required to receive this update. You have the option to set an update window through the Azure management portal. If no update window is specified, the update will automatically occur.
Visit Redis to learn more about this version. Please note that the Redis Modules feature isn’t supported at this time.