diff --git a/nginx-proxy/docker-compose.nginx.yml b/nginx-proxy/docker-compose.nginx.yml
index ad9022c..a8c5728 100755
--- a/nginx-proxy/docker-compose.nginx.yml
+++ b/nginx-proxy/docker-compose.nginx.yml
@@ -29,6 +29,7 @@ services:
     environment:
       - DEFAULT_EMAIL=${LETSENCRYPT_EMAIL}
       - NGINX_PROXY_CONTAINER=nginx-proxy
+      - ACME_CA_URI=https://acme-staging-v02.api.letsencrypt.org/directory
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock:ro
       - ${ROOT_INSTALL}/data/nginx-proxy/conf.d:/etc/nginx/conf.d