diff --git a/target/mta-sts-daemon/mta-sts-daemon.yml b/target/mta-sts-daemon/mta-sts-daemon.yml
index e9b47601..4d5d5e55 100644
--- a/target/mta-sts-daemon/mta-sts-daemon.yml
+++ b/target/mta-sts-daemon/mta-sts-daemon.yml
@@ -1,3 +1,4 @@
+# Docs: https://github.com/Snawoot/postfix-mta-sts-resolver/blob/master/man/mta-sts-daemon.yml.5.adoc
 path: /var/run/mta-sts/daemon.sock
 mode: 0666
 cache: