diff --git a/Makefile b/Makefile
index 3da983d..b0f17fb 100644
--- a/Makefile
+++ b/Makefile
@@ -225,41 +225,7 @@ uninstall_crontab:
 	sudo mv crontab.tmp /etc/periodic/daily/joeac.net
 	sudo chmod +x /etc/periodic/daily/joeac.net
 
-.PHONY: install_dyndns
-install_dyndns: /usr/local/bin/dyndns.sh ~/.config/dyndns/DIGITALOCEAN_TOKEN
-
-/usr/local/bin/dyndns.sh: /usr/local/lib/digitalocean_dyndns/dyndns.sh /usr/local/bin/get_ip_addr.sh
-	sudo rm -f /usr/local/bin/dyndns.sh
-	sudo cp /usr/local/lib/digitalocean_dyndns/dyndns.sh /usr/local/bin/dyndns.sh
-
-/usr/local/bin/get_ip_addr.sh: /usr/local/lib/digitalocean_dyndns/get_ip_addr.sh
-	sudo rm -f /usr/local/bin/get_ip_addr.sh
-	sudo cp /usr/local/lib/digitalocean_dyndns/get_ip_addr.sh /usr/local/bin/get_ip_addr.sh
-
-/usr/local/lib/digitalocean_dyndns/%:
-	cd /usr/local/lib \
-		&& sudo git clone https://git.joeac.net/joeac/digitalocean_dyndns.git \
-
-~/.config/dyndns/DIGITALOCEAN_TOKEN: DIGITALOCEAN_TOKEN
-	mkdir -p ~/.config/dyndns/
-	rm -f ~/.config/dyndns/DIGITALOCEAN_TOKEN
-	cp DIGITALOCEAN_TOKEN ~/.config/dyndns/DIGITALOCEAN_TOKEN
-
-/etc/periodic/daily/dyndns-%joeac.net:
-	echo "#!/bin/sh" > crontab.tmp
-	echo "                      dyndns.sh 4 $(*F)joeac.net" >> crontab.tmp
-	echo "CONN_DEVICE_NAME=eth0 dyndns.sh 6 $(*F)joeac.net" >> crontab.tmp
-	sudo mv crontab.tmp $@
-	sudo chmod +x $@
-
-.PHONY: uninstall_dyndns
-uninstall_dyndns:
-	sudo rm -rf \
-		/usr/local/bin/dyndns.sh \
-		/usr/local/bin/get_ip_addr.sh \
-		/usr/local/lib/digitalocean_dyndns/ \
-		~/.config/dyndns \
-		~/.cache/dyndns
+include dyndns.mk
 
 .PHONY: clean
 clean:
diff --git a/dyndns.mk b/dyndns.mk
new file mode 100644
index 0000000..9ea751d
--- /dev/null
+++ b/dyndns.mk
@@ -0,0 +1,38 @@
+.PHONY: install_dyndns
+install_dyndns: /usr/local/bin/dyndns.sh ~/.config/dyndns/DIGITALOCEAN_TOKEN
+
+.PHONY: reinstall_dyndns
+reinstall_dyndns: /usr/local/bin/dyndns.sh ~/.config/dyndns/DIGITALOCEAN_TOKEN
+
+.PHONY: uninstall_dyndns
+uninstall_dyndns:
+	sudo rm -rf \
+		/usr/local/bin/dyndns.sh \
+		/usr/local/bin/get_ip_addr.sh \
+		/usr/local/lib/digitalocean_dyndns/ \
+		~/.config/dyndns \
+		~/.cache/dyndns
+
+/usr/local/bin/dyndns.sh: /usr/local/lib/digitalocean_dyndns/dyndns.sh /usr/local/bin/get_ip_addr.sh
+	sudo rm -f /usr/local/bin/dyndns.sh
+	sudo cp /usr/local/lib/digitalocean_dyndns/dyndns.sh /usr/local/bin/dyndns.sh
+
+/usr/local/bin/get_ip_addr.sh: /usr/local/lib/digitalocean_dyndns/get_ip_addr.sh
+	sudo rm -f /usr/local/bin/get_ip_addr.sh
+	sudo cp /usr/local/lib/digitalocean_dyndns/get_ip_addr.sh /usr/local/bin/get_ip_addr.sh
+
+/usr/local/lib/digitalocean_dyndns/%:
+	cd /usr/local/lib \
+		&& sudo git clone https://git.joeac.net/joeac/digitalocean_dyndns.git
+
+~/.config/dyndns/DIGITALOCEAN_TOKEN: DIGITALOCEAN_TOKEN
+	mkdir -p ~/.config/dyndns/
+	rm -f ~/.config/dyndns/DIGITALOCEAN_TOKEN
+	cp DIGITALOCEAN_TOKEN ~/.config/dyndns/DIGITALOCEAN_TOKEN
+
+/etc/periodic/daily/dyndns-%joeac.net: /usr/local/bin/dyndns.sh
+	echo "#!/bin/sh" > crontab.tmp
+	echo "                      /usr/local/bin/dyndns.sh 4 $(*F)joeac.net" >> crontab.tmp
+	echo "CONN_DEVICE_NAME=eth0 /usr/local/bin/dyndns.sh 6 $(*F)joeac.net" >> crontab.tmp
+	sudo mv crontab.tmp $@
+	sudo chmod +x $@