 On 6 April 2017, he extended his contract with Dortmund until 30 June 2019.On 13 March 2018, Borussia Dortmund announced that the club had reached an agreement with Piszczek for a contract extension which will keep him at the club until 30 June 2020.Piszczek also announced that he would retire from professional football at the end of his contract, a claim he later clarified saying he's still "not certain".