Abstract: A firmware update of a USB device is described. In an example, a method comprises: communicating from a first device to a second device by a configuration channel of a universal serial bus; identifying, by the first device, that the second device supports a firmware update mode for an update of a firmware of the second device; commanding, by the first device, the second device to enter the firmware update mode; receiving, by the first device, information of the firmware from the second device; based on the received firmware information, obtaining, by the first device, the update of the firmware; and sending, by the first device, the update of the firmware to the second device, wherein the steps of identifying, commanding, receiving, and sending are conducted by the communication via the configuration channel of the universal serial bus. In other examples, a computer program product and a device are discussed along with the features of the method.