Which laser is effective for deep melasma?

As I get older, I'm getting a lot of melasma on my face. Even though I apply sunscreen meticulously, it seems there is nothing I can do about the effects of time. So I tried using melasma cream, but it has had almost no effect. I looked into various treatments, and there are so many reviews saying that regular toning treatments don't get rid of melasma no matter how many times you receive them. What type of laser is effective for removing deep melasma?