diff --git a/acme-tool.service b/acme-tool.service
index 6ff7a40..1bdd979 100644
--- a/acme-tool.service
+++ b/acme-tool.service
@@ -7,5 +7,5 @@ Type=oneshot
 User=root
 PrivateTmp=true
 NoNewPrivileges=true
-ExecStart=/etc/acme/acme-tool
+ExecStart=/etc/acme/acme-tool cron