"Catch-Up" or "Catch Up"?

Maybe one of the reasons Wikipedia wants to delete our page is because of the confusion between Catch-Up and Catch-up. We at TheCatchUpRule.com were not sure either, so we did some research.

According to dictionary.com and merriam-webster.com Catch-up, with a dash, is the right usage of the word.

Even though dictionary.com uses the two different versions in two different examples back to back:

So it is official, The Catch-Up Rule has a dash!