A method and device for updating a session in a terminal. The method includes: performing one or more services with one or more entities; and transmitting, to a management server, a capability information update message, including information about one or more changed capabilities, when one or more capabilities change, in order to notify the one or more entities of the one or more changed capabilities. The information about the one or more changed capabilities comprises a parameter indicating a version of the information about the one or more changed capabilities. The method further includes updating a session with the one or more entities by using the information about the one or more changed capabilities.