diff --git a/rtorrent.yml b/rtorrent.yml
index ddbb35e..cc4e1b4 100644
--- a/rtorrent.yml
+++ b/rtorrent.yml
@@ -1,4 +1,5 @@
 ---
+version: "3.1"
 services:
   rtorrent:
     image: binhex/arch-rtorrentvpn