The national average price for regular unleaded gas dropped to $3.99 a gallon on Thursday, according to the American Automobile Association. That price is the lowest it’s been since early March.

Gasoline prices surged to a record high in June at $5.02 per gallon amid Russia’s war in Ukraine, according to AAA data.

The AAA had anticipated that the national average could drop to below $4 this month as fears of major restrictions on supply have eased since Moscow first launched its invasion in February.

The association also noted that fewer drivers have been fueling up lately, as Americans change “their driving habits to cope with higher pump prices.”