Looks like your garage is a wooden construction with walls with studs and triangle rafters, like mine. I had the same problem and just jacked the whole construction up a couple of inches. Then put a row of blocks under the walls, and a clear rubbery lip at the bottom of the door, on the inside.
It will actually go all the way in with out hitting lol I would love to raise it higher but we are in a historical area of town so they likely wouldnt let me do that