diff --git a/nextcloud/Dockerfile b/nextcloud/Dockerfile
index 635b9ce..a850ddb 100644
--- a/nextcloud/Dockerfile
+++ b/nextcloud/Dockerfile
@@ -75,6 +75,7 @@ RUN ln -sf /opt/config/nginx.conf /etc/nginx/sites-enabled/default; \
 RUN chown www-data /opt/config
 
 ADD start.sh /usr/local/bin/run
+ADD cron.sh /usr/local/bin/cron.sh
 VOLUME /opt/storage /opt/config /opt/log /opt/static
 EXPOSE 9787/tcp
 ENTRYPOINT /usr/local/bin/run
diff --git a/nextcloud/cron.sh b/nextcloud/cron.sh
new file mode 100755
index 0000000..47cff09
--- /dev/null
+++ b/nextcloud/cron.sh
@@ -0,0 +1,16 @@
+#!/usr/bin/env sh
+set -e
+
+echo "Preparing environment"
+cp /opt/config/config.php /var/www/nextcloud/config/config.php
+chown -R www-data /var/www/nextcloud/config /var/www/nextcloud/apps /opt/log
+chmod +x ./occ
+mkdir -p /run/php
+export USER=www-data HOME=/home/www-data
+
+echo "Syncing system address books with dav"
+su -s /var/www/nextcloud/occ www-data dav:sync-system-addressbook
+
+echo "Running cron.php"
+su -s /usr/bin/php www-data /var/www/nextcloud/cron.php
+