diff --git a/portainer.json b/portainer.json
index 9947dc3..ddd359b 100644
--- a/portainer.json
+++ b/portainer.json
@@ -119,6 +119,12 @@
             "description": "Version de Redmine (latest si vide)",
             "default": "latest"
           },
+          {
+            "name": "MYSQL_VERSION",
+            "label": "Redmine version",
+            "description": "Version de Redmine (latest si vide)",
+            "default": "5.7"
+          },
           {
             "name": "ROUTER_NAME",
             "label": "router host",
diff --git a/redmine/docker-compose.yml b/redmine/docker-compose.yml
index f073f03..aee13e7 100644
--- a/redmine/docker-compose.yml
+++ b/redmine/docker-compose.yml
@@ -20,7 +20,7 @@ services:
       - traefik.http.routers.${ROUTER_NAME}-router.rule=Host(`${APP_HOST}`)
       - traefik.http.routers.${ROUTER_NAME}-router.tls=true
   db:
-    image: mysql:${version}
+    image: mysql:${MYSQL_VERSION}
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: ${REDMINE_DB_PASSWORD}