diff --git a/debian/wireguard-config.postinst b/debian/wireguard-config.postinst
new file mode 100644
index 0000000..d29471f
--- /dev/null
+++ b/debian/wireguard-config.postinst
@@ -0,0 +1,11 @@
+#!/bin/sh
+#
+# TODO: Handle "$1".
+
+set -e
+
+#DEBHELPER#
+
+# Start wireguard service with `wg0.conf`.
+deb-systemd-helper enable wg-quick@wg0
+deb-systemd-invoke restart wg-quick@wg0