diff --git a/Mainnet/docker-compose.yml b/Mainnet/docker-compose.yml
index 9ae0cf7..2d8b347 100644
--- a/Mainnet/docker-compose.yml
+++ b/Mainnet/docker-compose.yml
@@ -44,7 +44,8 @@ services:
       - "nginx_html:/usr/share/nginx/html"
       - "nginx_certs:/etc/nginx/certs:rw"
     environment:
-      - NGINX_DOCKER_GEN_CONTAINER=nginx-gen
+      - NGINX_DOCKER_GEN_CONTAINER: nginx-gen
+      - ACME_CA_URI:
     links:
       - nginx