In response to a lawsuit filed by writer Benedict Fitzgerald, a judge has ordered movie mogul Mel Gibson to answer specific questions about expenses for his hit saga The Passion of the Christ.

Fitzgerald claims Gibson underpaid him for his work. The claim is that writer payments were lowered for Gibson-related expenses, a contractual violation. The screenwriter’s lawyer says Gibson spent large sums for personal reasons while filming in Italy, including $78,000 on a chiropractor bill.

Gibson has been ordered to appear for a deposition by mid-January to answer questions regarding the film. So far, his lawyer is unavailable for comment.