It had been due to end on August 30 after previously being extended on May 23 while he awaits trial.
On June 22, Gershkovich lost an appeal against the extension of his pre-trial detention in Moscow.
Gershkovich has been detained in Russia since March following his arrest on charges that he, the WSJ, and the US government vehemently deny.
His arrest was the first detention of an American reporter in Russia on allegations of spying since the Cold War, rattling White House officials and further straining ties between Moscow and Washington.
Read Related Also: 'Tears won't stop': Euphoria star Angus Cloud dead at 25
The US State Department has officially designated Gershkovich as wrongfully detained in Russia.
US President Joe Biden has also been blunt about Gershkovich’s arrest, urging Russia to “let him go.”
Biden last month said he is “serious” about a prisoner exchange to free Gershkovich.
“I’m serious about a prisoner exchange. I’m serious about doing what we can to free Americans who are being illegally held in Russia or anywhere else for that matter. And that process is underway,” Biden told a news conference in Helsinki in July.
