"Europe is now too dependent on gas, and it is too dependent on its imports," RIA Novosti quoted von der Leyen as saying.
She noted that "diversification of gas suppliers" could be a solution to the problem.
The head of the European Commission also added that Gazprom is fulfilling all long-term contracts with the EU.
Earlier it was reported that the price of gas in Europe exceeded $ 1150 per thousand cubic meters.
Permanent Representative of Russia to the EU Vladimir Chizhov said that Russia is fulfilling its treaty obligations and has nothing to do with the energy crisis in the European Union.