diff --git a/Dockerfile b/Dockerfile
index 541e98f..2c800d7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -52,6 +52,7 @@ RUN php5enmod opcache-config php-config
 
 # Add our crontab.
 COPY docker/crontab /etc/cron.d/harvester
+RUN chmod go= /etc/cron.d/harvester
 
 # Script for setting up harvester.
 COPY docker/harvester /etc/my_init.d/