Couchbase 4.0 Running Serverside Moxi Proxy Upgrade Process

Couchbase Server 4.0.0-4051 (CE)

We’re running Couchbase using the memcached protocol by running Moxi on the server side and connect clients to the proxy using memcached sdks. We’d like to continue continue Couchbase as a caching layer to keep pressure off of our database. What is the current recommended upgrade path for our configuration to version 6? Do we need to upgrade to 5.0 and then switch over the Couchbase SDKs and follow the standard procedure from there? Thanks.