Russian lawmakers have passed legislation changing the age categories for those called up for the military potentially meaning that older troops could be sent to fight in Ukraine.

With President Vladimir Putin’s forces reportedly facing heavy losses in his invasion of Ukraine, Russia’s parliament, the Duma, has this week passed a raft of measures to help with mobilization, including tougher fines for those who avoid the draft as well as extending upper age limits for reserves.

The State Duma said Tuesday it had adopted a law raising the maximum age by half a decade for those who had already completed military service.