diff --git a/cmd/dhcp4/dhcp4.go b/cmd/dhcp4/dhcp4.go
index 050516e..e73c41e 100644
--- a/cmd/dhcp4/dhcp4.go
+++ b/cmd/dhcp4/dhcp4.go
@@ -61,6 +61,9 @@ func logic() error {
 		if err := notify.Process("/user/netconfi", syscall.SIGUSR1); err != nil {
 			log.Printf("notifying netconfig: %v", err)
 		}
+		if err := notify.Process("/user/dyndns", syscall.SIGUSR1); err != nil {
+			log.Printf("notifying dyndns: %v", err)
+		}
 		select {
 		case <-time.After(time.Until(c.Config().RenewAfter)):
 			// fallthrough and renew the DHCP lease
diff --git a/cmd/dhcp6/dhcp6.go b/cmd/dhcp6/dhcp6.go
index 7422217..e831b67 100644
--- a/cmd/dhcp6/dhcp6.go
+++ b/cmd/dhcp6/dhcp6.go
@@ -57,6 +57,9 @@ func logic() error {
 		if err := notify.Process("/user/radvd", syscall.SIGUSR1); err != nil {
 			log.Printf("notifying radvd: %v", err)
 		}
+		if err := notify.Process("/user/dyndns", syscall.SIGUSR1); err != nil {
+			log.Printf("notifying dyndns: %v", err)
+		}
 		select {
 		case <-time.After(time.Until(c.Config().RenewAfter)):
 			// fallthrough and renew the DHCP lease