diff --git a/hosting/proxy/Dockerfile b/hosting/proxy/Dockerfile
index a9c94c06fa..f11480fd73 100644
--- a/hosting/proxy/Dockerfile
+++ b/hosting/proxy/Dockerfile
@@ -6,6 +6,7 @@ FROM nginx:latest
 ENV NGINX_ENVSUBST_OUTPUT_DIR=/etc/nginx
 COPY .generated-nginx.prod.conf /etc/nginx/templates/nginx.conf.template
 COPY 10-listen-on-ipv6-by-default.sh /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
+RUN chmod +x /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
 
 # Error handling
 COPY error.html /usr/share/nginx/html/error.html