2002 Jeep Cherokee Higher than normal oil pressure

My jeep is a all time 4 wheel drive vehicle (or at least thats the claim). The oil pressure display guage located on the dash near the speedometer has been reading higher than it has in the past. The guage itself has 5 lines. The middle line being the 3rd. Usually it would be somewhere between the 3rd and 4th. Now it is nearing the 5th line, or the H symbol. Ive had my oil changed recently, but maybe there is something else going on im not aware of. Any help is greatly appreciated. Thank you very much!