diff --git a/petrified.timer b/petrified.timer
new file mode 100644
index 0000000..bf9cc6b
--- /dev/null
+++ b/petrified.timer
@@ -0,0 +1,18 @@
+#
+# /usr/lib/systemd/system/petrified.timer
+#
+# Note: Only one timer is needed if running multiple service
+# units for multiple interfaces. No need to duplicate.
+#
+
+[Unit]
+Description=Petrified update every 6 hours
+
+[Timer]
+Unit=petrified.service
+OnActiveSec=0s
+OnCalendar=0/6:00:00
+Persistent=true
+
+[Install]
+WantedBy=timers.target
\ No newline at end of file