diff --git a/manifest.json b/manifest.json
index 767d370..dc172e5 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,6 +1,7 @@
 {
     "name": "Baikal",
     "id": "baikal",
+    "packaging_format": 1,
     "description": {
         "en": "Lightweight CalDAV+CardDAV server",
         "fr": "Serveur CalDAV+CardDAV léger"