An electrical connector including a connector housing having a mating face that is configured to engage a mating connector. The electrical connector also includes a contact module that is held by the connector housing and that includes differential pairs of signal conductors. The contact module also includes dielectric ribs that encase corresponding signal conductors. The dielectric ribs are spaced apart from one another. The contact module also includes guard conductors that extend between and couple to adjacent dielectric ribs. The contact module also includes a conductive layer that is disposed on the dielectric ribs and the guard conductors. The conductive layer is electrically coupled to the guard conductors.