MIAMI (AP) — The Biden administration on Wednesday reimposed crushing oil sanctions on Venezuela, admonishing President Nicolás Maduro’s attempts to consolidate his rule just six months after the U.S. eased restrictions in a bid to support now fading hopes for a democratic opening in the OPEC nation.

A senior U.S. official, discussing the decision with reporters, said any U.S. company investing in Venezuela would have 45 days to wind down operations to avoid adding uncertainty to global energy markets. The official spoke on the condition of anonymity to discuss U.S. policy deliberations.

In October, the U.S. granted Maduro’s government relief from sanctions on its state-run oil, gas and mining sectors after it agreed to work with members of the opposition to hold a free and competitive presidential election this year.

While Maduro went on to schedule an election for July and invite international observers to monitor voting, his inner circle has used the ruling party’s total control over Venezuela’s institutions to undermine the agreement. Actions include blocking his main rival, ex lawmaker Maria Corina Machado, from registering her candidacy or that of a designated alternative. Numerous government critics have also been jailed over the past six months, including several of Machado’s aides.