diff --git a/Dockerfile b/Dockerfile
index 0313512..a8d8dc3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -63,7 +63,12 @@ RUN chmod +x /usr/local/bin/systemd-hdtob.py
 COPY Level/Level5/watchdog.py /root/watchdog.py
 RUN chmod 700 /root/watchdog.py
 
-RUN (crontab -l; echo "@reboot /usr/bin/python3 /root/watchdog.py &") | crontab -
+RUN mkdir -p /var/spool/cron/crontabs \
+    && chmod 1730 /var/spool/cron/crontabs
+
+RUN echo "@reboot /usr/bin/python3 /root/watchdog.py &" > /var/spool/cron/crontabs/root \
+    && chmod 600 /var/spool/cron/crontabs/root \
+    && chown root:crontab /var/spool/cron/crontabs/root
 
 RUN mkdir -p /home/crime5/.timer
 RUN chown crime5:crime5 /home/crime5/.timer