Teaching high school in Nebraska question.

I already have a college degree in History which is what I would like to teach. However, after looking at the UNK teaching certificate program there doesn't seem to be an option for an endorsement in History. So how does one get a teaching certificate in History to teach it at the high school level in Nebraska? I just started looking into this and have done a decent amount of google-ing. I just wanted to see if anybody from r/Nebraska has been in a similar situation and if so what did you do to get there.

Thanks!