Russian inflation accelerated in May to the highest in more than a year, adding to pressure on the central bank to hike the key rate to curb price growth.

Annual inflation reached 8.3% last month, from 7.84% in April, the highest since February last year, Federal Statistics Service data showed late Friday. Price growth jumped to 0.74% in monthly terms from 0.5% in April.

Bank of Russia Governor Elvira Nabiullina last week warned of the possibility of a “significant” rate hike in July if inflationary pressures don’t start to ease. That came after the central bank held the rate at 16% for the fourth meeting in a row, as Russia’s war in Ukraine continues to overheat the economy and stoke inflation.

With government spending on the rise, Nabiullina has been turning more hawkish as economic growth, local demand and price increases have consistently outpaced the central bank’s expectations. The bank said June 7 that it anticipates inflation will return to its 4% goal in 2025.