diff --git a/Dockerfile b/Dockerfile
index 9c9c61d..7ec456d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@ COPY ./update-dns.sh /usr/local/bin/
 RUN chmod +x /usr/local/bin/update-dns.sh
 
 RUN mkdir -p /etc/cron.d/
-RUN echo -e "*/10 * * * * update-dns.sh > /proc/1/fd/1 2>/proc/1/fd/2\n" > /etc/cron.d/dns-cron
+RUN echo -e "*/10 * * * * update-dns.sh\n" > /etc/cron.d/dns-cron
 RUN crontab /etc/cron.d/dns-cron
 
 CMD ["crond", "-f"]
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