A method performed by a wireless device for resuming a radio connection in a wireless communications network comprising a first Radio Access Technology, RAT, and a second RAT being different from the first RAT, wherein the wireless device is operating in a first cell served by a first radio network node operating in the first RAT, and wherein the method comprises: when a connection with first cell is suspended, - performing a re-selection to a second cell served by a second radio network node operating in the second RAT; - triggering an RRC resume procedure in the second cell; - receiving a first set of parameters associated with the first cell, wherein the first set of parameters comprises at least one parameter identifying the wireless device or the first cell; - receiving a second set of parameters associated with the second cell, wherein the second set of parameters comprises at least one parameter identifying the wireless device or the second cell; the method is characterised by - determining an updated version of one or more parameters of the first set of parameters or an updated version of one or more parameters of the second set of parameters; - determining a security token based on at least one out of the first set of parameters and the updated version of the one or more parameters of the first set of parameters, and based on at least one out of the second set of parameters and the updated version of the one or more parameters of the second set of parameters; and - transmitting, to the second cell, a resume request message comprising the security token. when a connection with first cell is suspended, - performing a re-selection to a second cell served by a second radio network node operating in the second RAT; - triggering an RRC resume procedure in the second cell; - receiving a first set of parameters associated with the first cell, wherein the first set of parameters comprises at least one parameter identifying the wireless device or the first cell; - receiving a second set of parameters associated with the second cell, wherein the second set of parameters comprises at least one parameter identifying the wireless device or the second cell; the method is characterised by - determining an updated version of one or more parameters of the first set of parameters or an updated version of one or more parameters of the second set of parameters; - determining a security token based on at least one out of the first set of parameters and the updated version of the one or more parameters of the first set of parameters, and based on at least one out of the second set of parameters and the updated version of the one or more parameters of the second set of parameters; and - transmitting, to the second cell, a resume request message comprising the security token. - performing a re-selection to a second cell served by a second radio network node operating in the second RAT; - triggering an RRC resume procedure in the second cell; - receiving a first set of parameters associated with the first cell, wherein the first set of parameters comprises at least one parameter identifying the wireless device or the first cell; - receiving a second set of parameters associated with the second cell, wherein the second set of parameters comprises at least one parameter identifying the wireless device or the second cell; the method is characterised by - determining an updated version of one or more parameters of the first set of parameters or an updated version of one or more parameters of the second set of parameters; - determining a security token based on at least one out of the first set of parameters and the updated version of the one or more parameters of the first set of parameters, and based on at least one out of the second set of parameters and the updated version of the one or more parameters of the second set of parameters; and - transmitting, to the second cell, a resume request message comprising the security token.