diff --git a/docker-compose.installer.yml b/docker-compose.installer.yml
index 4ce557b8f..a9773510c 100644
--- a/docker-compose.installer.yml
+++ b/docker-compose.installer.yml
@@ -1,3 +1,5 @@
+version : '2.2'
+
 services :
   installer :
     container_name : azuracast_installer