diff --git a/Dockerfile b/Dockerfile
index 9c68d96..551866d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM node:latest
 ENV HOSTNAME=${HOSTNAME:-haraka}
 
 RUN echo "deb http://ftp.debian.org/debian jessie-backports main" >> /etc/apt/sources.list && \
-    apt-get update && apt-get upgrade -y && apt-get -t jessie-backports install -y supervisor certbot && \
+    apt-get update && apt-get upgrade -y && apt-get -t jessie-backports install -y supervisor certbot cron && \
     rm -rf /var/lib/apt/lists/* && \
     mkdir /var/log/supervisord && \
     mkdir /var/run/supervisord && \
diff --git a/cron.sh b/cron.sh
index a5ce8d4..9e31795 100644
--- a/cron.sh
+++ b/cron.sh
@@ -1,3 +1,2 @@
-set -eu
-
-crond -m off
+source /etc/default/cron
+/usr/sbin/cron