I have horizontal line when smile after lip filler. Any suggestions? (photos)

I received juvederm ultra back in oct '14. I pretty much had a non existent upper lip. I never went back for more and it's been over a year and I still have a line above my lip when I smile. I don't think I have any more filler however my lips have more fullness to them than they did prior to getting injected. I don't know if it's filler that remains, or new collagen. Regardless, what can be done to repair that line when I smile? I have looked at photos and am confident it was not there before !