diff --git a/Dockerfile b/Dockerfile
index bee126d..c59692d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,6 +18,11 @@ ENV PLEX_SERVERNAME ''
 ENV JELLYFIN_BASEURL ''
 ENV JELLYFIN_TOKEN ''
 
+ENV SYNC_FROM_PLEX_TO_JELLYFIN 'True'
+ENV SYNC_FROM_JELLYFIN_TO_PLEX 'True'
+ENV SYNC_FROM_PLEX_TO_PLEX 'True'
+ENV SYNC_FROM_JELLYFIN_TO_JELLYFIN 'True'
+
 ENV BLACKLIST_LIBRARY ''
 ENV WHITELIST_LIBRARY ''
 ENV BLACKLIST_LIBRARY_TYPE  ''