Main title theme should be entered once for the series, rather than having to enter it for each episode

I am updating the Main Title Theme for the series Justified. The process is instructing me to update this information in each episode - it won't accept it as a new credit for the whole series. I really don't have the time to go through each episode of all 5 seasons to enter the same information for all of them. Please allow a way to enter credit for Main Title Theme that can be entered once and applied to all episodes in the series. Thanks!