Every time I bend over slightly, my gun grip pops out from under my shirt.

I carry a XD-9 full size (I know its a bit big but it's all I got) in an Alien Gear holster in this position. The only problem I am having is that if I bend at the waist, my gun pops from under my shirt.Admittedly, my part Italian ass made my torso long and my legs short. Is there anything I can do? My clips on the holster are located at the top on the right side, and the bottom on the left. via /r/CCW http://ift.tt/2jnqgH3