Two high-ranking members of Congress are clamoring for drug maker Mylan to produce documents about its controversial 400 percent price hike of the EpiPen.

Reps. Jason Chaffetz, R-Utah, and Elijah Cummings, D-Md., sent a letter Friday to Mylan, saying that the company hasn’t produced enough documents “despite repeated requests.” Chaffetz is chairman and Cummings the top Democrat of the House Oversight and Government Reform Committee, which held a hearing on Mylan last year.