Elevator system, comprising: a cabin which is movable between landings and has a cabin door opening and a cabin door which can be shifted to open and close the cabin door opening, a controllable cabin door drive which is designed to shift the cabin door, a landing door which is provided at at least one of the landings in the installed state of the elevator system and can be shifted to open and close a landing door opening, a controllable landing door drive which is designed to shift the landing door, a cabin-side communication unit and a landing-side communication unit which are designed for wireless communication with one another, a control device which is designed to coordinate a shifting movement of the cabin door and a shifting movement of the landing door with one another, the control device having a cabin-side control apparatus which is connected or can be connected to the cabin-side communication unit for data transmission and which is designed to control the cabin door drive in an open-loop and/or closed-loop manner, and having a landing-side control apparatus which is connected or can be connected to the landing-side communication unit for data transmission and which is designed to control the landing door drive in an open-loop and/or closed-loop manner, the cabin-side communication unit and the landing-side communication unit being designed for bidirectional communication with one another, an electrically actuatable and manually unlockable additional locking mechanism being provided on the landing door, which locking mechanism is configured such that it can only be unlocked by the landing-side control apparatus when the cabin is at the same height as the landing, characterised in that the landing-side control apparatus is designed, in the case of a manual unlocking of the additional locking mechanism, to open the landing door by a predetermined amount, preferably by a shift distance of 2 to 10 cm, particularly preferably 5 cm, to apply a torque in the opening direction to the landing door, which torque is below the breakaway torque of said door, and to attempt to close the landing door again after a subsequent standstill of the landing door for 3 to 15 s, preferably approximately 5 s. a cabin which is movable between landings and has a cabin door opening and a cabin door which can be shifted to open and close the cabin door opening, a controllable cabin door drive which is designed to shift the cabin door, a landing door which is provided at at least one of the landings in the installed state of the elevator system and can be shifted to open and close a landing door opening, a controllable landing door drive which is designed to shift the landing door, a cabin-side communication unit and a landing-side communication unit which are designed for wireless communication with one another, a control device which is designed to coordinate a shifting movement of the cabin door and a shifting movement of the landing door with one another, the control device having a cabin-side control apparatus which is connected or can be connected to the cabin-side communication unit for data transmission and which is designed to control the cabin door drive in an open-loop and/or closed-loop manner, and having a landing-side control apparatus which is connected or can be connected to the landing-side communication unit for data transmission and which is designed to control the landing door drive in an open-loop and/or closed-loop manner, the cabin-side communication unit and the landing-side communication unit being designed for bidirectional communication with one another, an electrically actuatable and manually unlockable additional locking mechanism being provided on the landing door, which locking mechanism is configured such that it can only be unlocked by the landing-side control apparatus when the cabin is at the same height as the landing, characterised in that the landing-side control apparatus is designed, in the case of a manual unlocking of the additional locking mechanism, to open the landing door by a predetermined amount, preferably by a shift distance of 2 to 10 cm, particularly preferably 5 cm, to apply a torque in the opening direction to the landing door, which torque is below the breakaway torque of said door, and to attempt to close the landing door again after a subsequent standstill of the landing door for 3 to 15 s, preferably approximately 5 s.