The young defender broke into the first team in 2013-14 and BVB are ready to reward the former Mainz starlet for his fine performances
The 22-year-old's existing deal runs until June 2017, but BVB are ready to reward the left-back for his fine development in the past six months with a two-year extension and a payrise.
"Concrete discussions with Durm and his agent [Rainer Zerber] will take place shortly," Zorc was quoted as saying by Kicker.
Durm made his debut for Dortmund in the Bundesliga last season and became a regular starter towards the end of the season, as first choice left back Marcel Schmelzer suffered an injury-hit season.
His performances during Schmelzer’s injury layoff led to his inclusion in Joachim Low’s 23-man World Cup squad, although he was an unused sub in all of Germany’s games in Brazil.
Schmelzer suffered a torn groin muscle in Dortmund’s 2-0 German Supercup victory against Bayern earlier this month, meaning Durm is likely to gain more first-team playing time in the coming weeks.