The 145-pound bout adds to the developing card, which takes place on Dec. 20 in Barueri, Sao Paulo, Brazil.
Dias (21-3-1) for the first time in his career is on a two-fight losing streak and will look to get back on the winning track with the Fight Night bout.
Elkins (18-4), unlike his Dec. 20 foe, is coming into the fight fresh off a win. In his last outing, Elkins dispatched Lucas Martins with a split decision win. The win, much like the upcoming clash with Dias, took place in Brazil.