diff --git a/stacks/mattermost.yml b/stacks/mattermost.yml
index c5ac8bb..0b16fc9 100644
--- a/stacks/mattermost.yml
+++ b/stacks/mattermost.yml
@@ -25,6 +25,7 @@ services:
       - MM_TEAMSETTINGS_MAXUSERSPERTEAM=${MAXUSERSPERTEAM:-100}
       - MM_SERVICESETTINGS_ENABLEAPICHANNELDELETION=${ENABLEAPICHANNELDELETION:-true}
       - MM_SERVICESETTINGS_ENABLELOCALMODE=${MM_SERVICESETTINGS_ENABLELOCALMODE:-true}
+      - MM_FILESETTINGS_MAXFILESIZE=${MM_FILESETTINGS_MAXFILESIZE:-104857600}
       - edition=team
     networks:
       - internal