DoorDash is offering extra compensation to U.S. and Canadian drivers as part of a temporary program to help offset rising gas prices.

The San Francisco-based delivery company announced the program Monday as the national average price for gas hit $3.96 per gallon in the U.S., according to AAA. That’s 35% higher than one month ago.

Global oil prices have soared since the Iran war began on Feb. 28. Last week, Brent crude oil, the international standard, briefly rose above $119 per barrel, up from roughly $70 before the war began.

Iran has halted most shipments of oil through the Strait of Hormuz and has also attacked oil and gas facilities around the Persian Gulf in response to an Israeli attack on an important Iranian natural gas field.

DoorDash said U.S. drivers with a DoorDash debit card will earn 10% cash back on any gas purchase, up from the usual rate of 2%. More than half of DoorDash drivers have the card, the company said.