diff --git a/init/ddns.service b/init/ddns.service
new file mode 100644
index 0000000..54b06f9
--- /dev/null
+++ b/init/ddns.service
@@ -0,0 +1,11 @@
+[Unit]
+Description=DDNS
+RefuseManualStart=no
+RefuseManualStop=yes
+
+[Service]
+Type=oneshot
+ExecStart=r53
+
+[Install]
+WantedBy=timers.target
diff --git a/init/ddns.timer b/init/ddns.timer
new file mode 100644
index 0000000..f26ed34
--- /dev/null
+++ b/init/ddns.timer
@@ -0,0 +1,14 @@
+[Unit]
+Description=DDNS
+RefuseManualStart=no
+RefuseManualStop=no
+
+[Timer]
+OnBootSec=1min
+OnCalendar=*-*-* *:00:00
+Persistent=true
+RandomizedDelaySec=1min
+Unit=ddns.service
+
+[Install]
+WantedBy=default.target