The victory is their fourth in five games and takes their tally to 12 goals in three home games but McKenna remained cautious.
"We're not getting too ahead of ourselves," the former Preston man added.
"Last month West Brom were scoring four or five goals a game and now they have had a bit of a sticky patch. Every team goes through it and we need to keep the run going.
"You aim to be at the top. It's nice to see us up there and we want to be up there as long as we can."
Bookmark with:
What are these?