diff --git a/docker/Dockerfile b/docker/Dockerfile
index 007568c..a7bc6a1 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -93,7 +93,7 @@ RUN mkdir -p /var/log/sigi
 # schedule cron jobs
 RUN crontab -l | { cat; echo "* * * * * /usr/local/bin/python ${HOME}/manage.py runjobs minutely >> /var/log/sigi/cron.log 2>&1"; } | crontab -
 RUN crontab -l | { cat; echo "0 * * * * /usr/local/bin/python ${HOME}/manage.py runjobs hourly >> /var/log/sigi/cron.log 2>&1"; } | crontab -
-RUN crontab -l | { cat; echo "0 0/4 * * * /usr/local/bin/python ${HOME}/manage.py runjob importa_gescon >> /var/log/sigi/cron.log 2>&1"; } | crontab -
+RUN crontab -l | { cat; echo "0 */4 * * * /usr/local/bin/python ${HOME}/manage.py runjob importa_gescon >> /var/log/sigi/cron.log 2>&1"; } | crontab -
 RUN crontab -l | { cat; echo "0 0 * * * /usr/local/bin/python ${HOME}/manage.py runjobs daily >> /var/log/sigi/cron.log 2>&1"; } | crontab -
 RUN crontab -l | { cat; echo "0 0 * * 0 /usr/local/bin/python ${HOME}/manage.py runjobs weekly >> /var/log/sigi/cron.log 2>&1"; } | crontab -
 RUN crontab -l | { cat; echo "0 0 1 * * /usr/local/bin/python ${HOME}/manage.py runjobs monthly >> /var/log/sigi/cron.log 2>&1"; } | crontab -