President Trump said Wednesday he was revoking a Biden-era license allowing Chevron to produce oil in Venezuela over what he said was strongman Nicolás Maduro’s failure to assist in deporting migrants.

Oil prices climbed for the first time in three days on Thursday, with supply worries resurfacing after U.S. President Donald Trump announced a reversal of a license given to Chevron to operate in Venezuela.

A permit issued by the United States government allowing energy giant Chevron Corp. to pump and export Venezuelan oil will be terminated this week.