diff --git a/mediawiki/mariadb.yaml b/mediawiki/mariadb.yaml
index da50123..1a8e1e0 100644
--- a/mediawiki/mariadb.yaml
+++ b/mediawiki/mariadb.yaml
@@ -84,7 +84,7 @@ spec:
             - name: MARIADB_DATABASE
               value: scw_PROD
             - name: MARIADB_AUTO_UPGRADE
-              value: true
+              value: "true"
           volumeMounts:
             - name: mariadb-pv
               mountPath: /var/lib/mysql