diff --git a/backups/rsyncvolumes/Dockerfile b/backups/rsyncvolumes/Dockerfile
index 845c0f0..ae43248 100644
--- a/backups/rsyncvolumes/Dockerfile
+++ b/backups/rsyncvolumes/Dockerfile
@@ -10,8 +10,7 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
 # Avoid overlayfs bug with tail
 VOLUME /var/log
 
-COPY crontab /etc/crontab
-RUN chmod 644 /etc/crontab
+COPY crontab ./crontab
 
 WORKDIR /opt/backup
 COPY rsync.template .
diff --git a/backups/rsyncvolumes/crontab b/backups/rsyncvolumes/crontab
index bd6c0bd..318a1a6 100644
--- a/backups/rsyncvolumes/crontab
+++ b/backups/rsyncvolumes/crontab
@@ -1,6 +1,5 @@
 # hourly backup
 # m h dom mon dow user	command
-15 *	* * *	root	/bin/bash /opt/backup/rsync.sh >> /var/log/cron.log 2>&1
-0 3	* * *	root	/usr/bin/python /opt/backup/plan.py >> /var/log/cron.log 2>&1
+15 *	* * *	/bin/bash /opt/backup/rsync.sh >> /var/log/cron.log 2>&1
+0 3	* * *	/usr/bin/python /opt/backup/plan.py >> /var/log/cron.log 2>&1
 # empty line needed
-
diff --git a/backups/rsyncvolumes/launch.sh b/backups/rsyncvolumes/launch.sh
index 29ad6bc..5e19f90 100644
--- a/backups/rsyncvolumes/launch.sh
+++ b/backups/rsyncvolumes/launch.sh
@@ -2,4 +2,4 @@
 
 envsubst < /opt/backup/rsync.template > /opt/backup/rsync.sh
 envsubst < /opt/backup/plan.tpl.py > /opt/backup/plan.py
-touch /var/log/cron.log && cron && tail -f /var/log/cron.log
+crontab ./crontab && touch /var/log/cron.log && cron && tail -f /var/log/cron.log
diff --git a/odoo/backups/Dockerfile b/odoo/backups/Dockerfile
index ab9e538..b7f2f97 100644
--- a/odoo/backups/Dockerfile
+++ b/odoo/backups/Dockerfile
@@ -13,8 +13,7 @@ RUN apt-get install -y --no-install-recommends cron gettext-base
 # Avoid overlayfs bug with tail
 VOLUME /var/log
 
-COPY crontab /etc/crontab
-RUN chmod 644 /etc/crontab
+COPY crontab ./crontab
 
 COPY backup.template .
 COPY plan.py .
diff --git a/odoo/backups/crontab b/odoo/backups/crontab
index 7b0c140..ee5c67a 100644
--- a/odoo/backups/crontab
+++ b/odoo/backups/crontab
@@ -1,6 +1,5 @@
 # daily odoo backup
 # m h dom mon dow user	command
-0 2	* * *	odoo	/bin/bash /home/odoo/backup.sh >> /var/log/cron.log 2>&1
-10 2	* * *	odoo	/usr/bin/python /home/odoo/plan.py >> /var/log/cron.log 2>&1
+0 2 * * * /bin/su - odoo -c "/bin/bash /home/odoo/backup.sh" >> /var/log/cron.log 2>&1
+10 2	* * *	/bin/su - odoo -c	""/usr/bin/python /home/odoo/plan.py" >> /var/log/cron.log 2>&1
 # empty line required at the end of this file for a valid cron file.
-
diff --git a/odoo/backups/launch.sh b/odoo/backups/launch.sh
index 098b975..8fc147f 100644
--- a/odoo/backups/launch.sh
+++ b/odoo/backups/launch.sh
@@ -2,4 +2,4 @@
 
 envsubst < /home/odoo/backup.template > /home/odoo/backup.sh
 chown odoo:odoo /home/odoo/backup.sh
-touch /var/log/cron.log && cron && tail -f /var/log/cron.log
+crontab ./crontab && touch /var/log/cron.log && cron && tail -f /var/log/cron.log