diff --git a/blueprints/mattermost/template.toml b/blueprints/mattermost/template.toml
index b6461c6b..dc410f3f 100644
--- a/blueprints/mattermost/template.toml
+++ b/blueprints/mattermost/template.toml
@@ -10,6 +10,7 @@ env = [
 "MM_SQLSETTINGS_DATASOURCE=postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB}?sslmode=disable&connect_timeout=10",
 "APP_PORT=8065",
 "TZ=UTC",
+"MATTERMOST_CONTAINER_READONLY=false",
 ]
 mounts = []