diff --git a/docker/Dockerfile b/docker/Dockerfile
index 8888611..cd5c444 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -39,7 +39,7 @@ WORKDIR /var/www
 ADD . /var/www/.
 
 ADD docker/rootfs/start.sh /etc/start.sh
-RUN  +x /etc/start.sh
+RUN chmod +x /etc/start.sh
 
 # nginx stuff
 ADD docker/rootfs/nginx.conf /etc/nginx/http.d/default.conf