The 23-year-old has enjoyed an impressive start to the 2017-18 campaign at the Allianz Stadium, already scoring 10 goals in seven Serie A appearances.
Dybala has put the speculation over his future to one side, having repeatedly seen his name linked with Manchester United, Barcelona and Real Madrid during the summer months.
Clubs continue to show a rumoured interest in the Argentina international due to his stellar form, but Marotta is refusing to budge and suggests that a new deal could be imminent.
"He is priceless, because we are not a selling club," he told La Stampa. "I always repeat that a player has his future in his hands and Paulo just said he wants to tie himself to our club for life.
"That means we will make another big financial sacrifice to keep him. We will soon lock him down to a new contract - it's what he asked us for."