diff --git a/Dockerfile b/Dockerfile
index 2cef8aa7..4f0c15c0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -28,10 +28,12 @@ RUN groupadd --gid "${USER_GID}" "${USER}" && \
 
 COPY . /home/pi/pialert
 
+RUN chmod -R a+rxw /home/pi/pialert/
+
 # Pi.Alert 
 RUN python /home/pi/pialert/back/pialert.py update_vendors \    
     && sed -ie 's/= 80/= '${PORT}'/g' /etc/lighttpd/lighttpd.conf \
-    && sed "s+TIMEZONE.*+TIMEZONE = '" ${TZ} "'+" /home/pi/pialert/config/pialert.conf \
+    && sed "s+TIMEZONE.*+TIMEZONE = '"${TZ}"'+" /home/pi/pialert/config/pialert.conf \
     && (crontab -l 2>/dev/null; cat /home/pi/pialert/install/pialert.cron) | crontab -
 
 # it's easy for permissions set in Git to be overridden, so doing it manually