diff --git a/docker-compose.yml.tmpl b/docker-compose.yml.tmpl
index 975f71a..16205ab 100644
--- a/docker-compose.yml.tmpl
+++ b/docker-compose.yml.tmpl
@@ -1,4 +1,4 @@
-version: "2"
+version: "2.1"
 services:
 {{ range files "docker/services" }}  {{ . }}:
 {{ include (print "docker/services/" .) }}{{ end }}