Is this a draw?

I ended up with the following position after a cagey OTB tournament game last year. White offered a draw and I accepted - an easy decision on my part.

It looks like a draw to me but I was wondering whether any of you endgame specialists can find anything at all for white in this position

White to play.

Yes,This is dead drawn altho white is a pawn up it dont count for nothing ie 1.b4 a5 2.bxa5 bxa5 3.a4 draws. the black king has the dark squares but not much use to him here.

Thank you!