See if the leak is coming from the spout (where water is supposed to come out of), or from where the spigot meets the bottom chamber.
If the leak is coming from the spout, tighten the round pedestal underneath the lever clockwise.
If the leak is at the bottom chamber, ensure that the washers are set up properly. If so, tighten the spigot nut. If none of these solutions work Contact Customer Service to replace the spigot.