A method for operating a server, including: establishing a communication connection between the server and a vehicle located in the parking facility via a communication network, the communication network being formed by a communication infrastructure of the parking facility, checking via the communication connection whether a software stored in the processing device of the vehicle must be updated, transmitting, as a function of the check, update data for updating the software to the vehicle via the communication connection using the server so that it is possible to update the software based on the update data while the vehicle is located in the parking facility. Also described is a server, a parking system for vehicles and a computer program.