diff --git a/Dockerfile b/Dockerfile
index 0cfed1e..692605f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,5 +3,5 @@ FROM certbot/certbot:amd64-latest
 COPY new-domain /usr/bin/new-domain
 COPY renew /etc/periodic/monthly/renew
 
-ENTRYPOINT /usr/sbin/crond -f
+ENTRYPOINT /usr/sbin/crond -fd0