diff --git a/doc/openvpn.8 b/doc/openvpn.8
index a694e187..598d5fce 100644
--- a/doc/openvpn.8
+++ b/doc/openvpn.8
@@ -1571,7 +1571,7 @@ This option is useful in cases
 where the remote peer has a dynamic IP address and
 a low\-TTL DNS name is used to track the IP address using
 a service such as
-.I http://dyndns.org/
+.I https://www.nsupdate.info/
 + a dynamic DNS client such
 as
 .B ddclient.