After an eight-fight run in the UFC’s flyweight division, Sergio Pettis (17-4 MMA, 8-4 UFC) is moving up 10 pounds.

That’s according to his head coach, Duke Roufus, who took to social media today to reveal the plan (via Instagram).

I am happy to announce my man @sergiopettis is returning to the Bantamweight Division. Sergio debuted in the @ufc at UFC 167 on the 20th Anniversary Of the UFC Card at age 20 years old at 135lbs. As a Bantamweight he went 3-1 and won both of his UFC Bonuses. We feel he is gonna be stronger and more explosive at this Division. We have reached out to the UFC Brass to have Sergio fight on the UFC Card in #milwaukee December 15. He is injury free from his fight at #ufc229 and resumes training today. Thank You Very Much for all of the Support #teampettis #roufusport #routangclan “We Grind Together, We Shine Together” #martialarts is #life 🥋#ufc #ufcmilwaukee #mma #fight #fighter #fighting #hardwork #dedication #fun #happy #training #lifestyle #positivevibes #spreadingpositivity #sergiopettis notice Sergio’s Body at 135 at #ufc181

Pettis went 5-3 during his time in the UFC’s flyweight division. Sitting at No. 4 in the USA TODAY Sports/MMAjunkie MMA flyweight rankings heading into this past weekend’s UFC 229 event, Pettis came up short via decision against Jussier Formiga, who entered the bout at No. 7.

Now, according to Roufus, Pettis will return to the division where he started his UFC run, going 2-1 in the division before making the move to 125 pounds.

Roufus said Pettis and his team are hoping to land a spot on the upcoming UFC on FOX 31 card, which takes place Dec. 15 in the fighter’s hometown of Milwaukee.

For complete coverage of UFC 229, check out the UFC Events section of the site.