SEPM Server up gradation from 12.1.5 to 12.1.6 mp1a

HEllo Guys 

i need some help and information,I have plan to upgrade our SEPM server.

current suitation:

TWO SEPM SERVER WITH SQL DATABASE,Both are in Cluster.

Both server is windows 2012 R2 server

Is there is special special installation method required for upgrading the sepm server???

or Its normal upgrade??