Abstract: A container locking system for vending machines, buildings, vehicles, or other containers comprising a door latch, a primary door lock assembly locking and controlling the latch, and a radio lock assembly comprising a radio transmitter, a radio receiver inside of the container, a solenoid operated when the receiver receives a signal from the transmitter, and a dead-bolt operated by the solenoid and preventing unlatching of the door latch except at times when the solenoid is operated by the transmitter whereby a thief who has a way of opening the door lock without force cannot open the door without noticeable forcible entry.