Is it possible for you to update a movies listed genres?

Would it be possible for you to update a movies listed genres? I check my list of favourite thrillers and saw that Jurassic Park III was in my top 10, which is outrageous on its own. But what make sit worse is that the original was not on the list at all, even though it is in my Top 20 of all time. So the thrid is listed as Thriller while the first two are not. They should all be Thrillers.