diff --git a/compose.yml b/compose.yml
index f31c5b2..7a00888 100644
--- a/compose.yml
+++ b/compose.yml
@@ -1,4 +1,6 @@
 
+# https://hub.docker.com/repository/docker/rardcode/chrony/tags
+
 services:
   chrony:
     image: rardcode/chrony