Some Massachusetts state prisons have started providing medication-assisted treatment for opioid addiction to new inmates at four facilities, The Boston Globe reports.

A state law that took effect this week requires the Department of Corrections to offer buprenorphine and methadone. The department is only providing buprenorphine for now, and is working on plans to administer methadone, the article notes. The state legislature allocated $2.2 million for the program in the current fiscal year.

“It’s long overdue,” said Dr. Christin Price, director of an addiction treatment clinic at Brigham and Women’s Hospital. “It will address a lot of the racial inequalities in addiction treatment and prevent the high mortality after release.”

New Jersey, Vermont, Connecticut and Rhode Island already offer medication-assisted treatment in state facilities.