How do I auto number chapters in a book file? The pages automatically update for me but I can't seem to get the chapter numbers to do so. I have multiple indd files but the chapter number won't change, only the page number.

I am creating multiple book files based on the indd files I have. In each book file the chapters are in different orders. How do I set up my parent page to automatically update the chapter numbers as it does for the page numbers? No matter what I try all the chapters keep the same number as the first in the book file.