Ullmark will be between the visiting pipes in Montreal on Saturday, according to Bruce Garrioch of Postmedia.
Ullmark has won three of his last four starts, boosting his record to 5-4-1 with a 3.37 GAA and an .863 save percentage across 10 starts this season. Montreal has averaged 3.64 goals per game this campaign, tying the team for fifth in the league.