Durie is now under contract with the CFL club through the 2014 season while Younger's deal will expire after the 2013 campaign.
Durie had 54 catches for 665 yards and four touchdowns last season. He also added 106 yards rushing on 18 carries.
Younger registered 42 tackles, a sack and one fumble recovery last year. He joined the Argos in 2004 as a cornerback before switching to linebacker in 2010.