diff --git a/Dockerfile b/Dockerfile
index 637363f..71c46cb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,7 @@
 FROM certbot/dns-digitalocean:latest
 
 COPY new-domain /usr/bin/new-domain
+COPY renew /etc/periodic/monthly/renew
 
 ENTRYPOINT /usr/sbin/crond -f
 
diff --git a/renew b/renew
new file mode 100644
index 0000000..96845ad
--- /dev/null
+++ b/renew
@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+
+/usr/local/bin/certbot renew
+