How upgrade plesk panel

1. go to control panel
2.Home >> Updates
3. We cant upgrade plesk directly to latest versin
only upgrade one by one i.e if we want to upgarde pleak from 9.2.1 to 9.5.1
then
a) first we want to uprade 9.2.1. to 9.2.2 then 9.2.3 and son
atlast upgarde to 9.5.1