diff --git a/Dockerfile b/Dockerfile
index a4487f0..6db3543 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,7 @@ EXPOSE 80
 
 # actual web content
 COPY www/ /usr/share/nginx/html
+RUN chmod -R 444 /usr/share/nginx/html
 
 # nginx config files
 COPY conf/nginx.conf /etc/nginx/nginx.conf