A second increase to French electricity prices in August cannot be ruled out but is not desirable, Junior Environment Minister Emmanuelle Wargon said on Friday.

The regulated power prices of state-controlled utility EDF will rise 5.9 percent in June, the highest increase in years, as a result of higher wholesale market prices. The increase was due for early this year but had been postponed by the government amid the “yellow vest” protests against low wages and purchasing power, according to Reuters.

France’s CRE energy regulator said earlier this month that another increase of about one percent may be necessary in August due to higher power transmission costs. Asked about the potential for a second increase, Wargon said on France Info radio: “It’s not desirable, but at this point I cannot say what will happen in August”.