CARACAS, Venezuela — President Nicolás Maduro said Venezuelans can buy gasoline at international market prices starting Monday, marking a historic break in the socialist country’s practice of having the world’s cheapest fuel.

Across the nation, 200 filling stations will charge drivers the equivalent of 50 cents a liter, or $1.90 a gallon, to fuel up. Venezuelans will also be able to buy a limited amount of subsidized gasoline each month, paying $0.025 a liter, less than a penny a gallon.

“The time has come to move toward a new policy, toward a new normality, toward a new situation,” Maduro said in a Saturday state TV broadcast, calling it a step to “regularizing” the costs.

Venezuela has the world’s largest underground oil reserves, but it has been forced to buy fuel from Iran to bridge deep shortages, as it is unable to pump crude oil from the ground and turn it into gasoline.

The last of five Iranian tankers is approaching Venezuela’s coast, but experts say even those shipments will supply the nation’s drivers for only a few weeks. Venezuela’s state-run oil company PDVSA is also attempting to restart gasoline production with Iran’s help.

Maduro accused the “imperialist” United States of leading an economic war against Venezuela, while Maduro’s critics say years of corruption and mismanagement by the socialist government led to the scarcities.

Fuel shortages have plagued the nation for years, but scarcity recently has even hit the capital of Caracas, sparking mile-long lines at filling stations that last for days.

Maduro said days earlier that he had appointed a team to consider gasoline prices. Venezuela paid in dollars for the Iranian gasoline, Maduro said, asking for the nation’s support in this transition.

Tampering with fuel prices in the past has been an explosive subject. In 1989, riots broke out, leading to nearly 300 deaths when then-President Carlos Andrés Pérez ordered an increase.

It remains unclear how the new system will work and whether the government can provide enough gasoline to meet demands.

Opposition leader Juan Guaidó was among critics speaking out Sunday against the new price structure. He said it’s another “mockery by the dictatorship,” calling on Venezuelans to “respond with force.”

Guaidó in early 2019 launched a campaign to oust Maduro with backing from the United States and nearly 60 other nations. Maduro, however, remains in power.