In 2013, after two successive promotions, Potter extended his contract with the club for another three years. On 27 October 2015, Östersund secured promotion to the Swedish top flight, Allsvenskan, for the first time in their history following a second-place finish in the 2015 Superettan. Östersund finished their debut season in eighth place, winning plaudits for their "slick passing game" and competing on a limited budget.