The invention relates to a device for bending at least one glass pane (I), at least comprising a gravity bending mold (1), which has a supporting surface (2), which is suitable for arranging at least one glass pane (I) thereon, an upper shaping tool (3) arranged opposite the supporting surface (2), which upper shaping tool is suitable for producing an overpressure on the surface (O) of the at least one glass pane (I) arranged on the supporting surface (2) that faces away from the supporting surface (2), wherein the shaping tool (3) has a cover (8), which forms a cavity (5) open toward the gravity bending mold (1), and is equipped with a sealing lip (7), which is arranged on an edge segment (4) of the cover (8), for contacting the surface (O) of the at least one glass pane (I) that faces away from the supporting surface (2), and wherein the shaping tool (3) is equipped with means for introducing a gas into the cavity (5) in order to produce the overpressure.