The 34-year-old veteran finished third on the Alouettes last season with 65 defensive tackles, including one sack.
Brown also had four knockdowns while contributing to a defensive unit that led the CFL with 47 turnovers.
The former Glenville State University Pioneer also made one interception while returning four fumbles and forcing two more.
"Jerald in an important cog in our defensive system and our team," Alouettes general manager Jim Popp said in a statement. "Since his arrival seven years ago, he stepped into a starting role and has performed at a high level at one of the more difficult positions in the CFL. He has brought leadership, physicality, and a true professional work ethic on a daily basis."