The Supreme Court on Thursday made it easier for employees to seek religious accommodations in a case involving a lawsuit brought by an evangelical Christian mail carrier who asked not to work on Sundays.

The case involved a claim brought by a Pennsylvania man, Gerald Groff, who says the U.S. Postal Service could have granted his request that he be spared Sunday shifts based on his religious belief that it is a day of worship and rest.

His case will now return to lower courts for further litigation.