That's the decision reached after the Vatican hosted its first-ever conference on fighting corruption and organised crime. The meeting gathered 50 prosecutors, bishops, victims and UN officials for a day of talks.
The Vatican said on Saturday the need had come to develop a new legal doctrine for the Catholic Church about "excommunication for corruption and mafia association".
Pope Francis has long railed against corruption, writing a short book about it as archbishop. And during a 2014 visit to one of Italy's mafia strongholds, Francis told mobsters they were excommunicated. But actually developing a doctrine around the concept would mark a new step for the Vatican.