diff --git a/Dockerfile b/Dockerfile
index c58c541..5552665 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,6 +34,7 @@ COPY crontab ${APP_DIR}/
 COPY *.py ${APP_DIR}/
 
 RUN \
+  rm -f /etc/crontab && \
   ln -s ${APP_DIR}/crontab /etc/crontab
 
 VOLUME ${APP_DIR}