Saeed Abedini is seen with his familyMore than 80 lawmakers have signed a letter urging Secretary of State John Kerry to step up efforts to free American citizen and Christian Pastor Saeed Abedini from an Iranian prison.

Abedini, who was sentenced to seven years in Tehran’s notorious Evin prison last month, has been unable to see his wife or two children, who are at the family home near Boise, Idaho. While Kerry has already called for his release, the senators and members of Congress called on him to “use every diplomatic avenue” to free Abedini.