diff --git a/docker-swarm/proxy/docker-compose.yml b/docker-swarm/proxy/docker-compose.yml
index 0f86e64..e96ef1c 100644
--- a/docker-swarm/proxy/docker-compose.yml
+++ b/docker-swarm/proxy/docker-compose.yml
@@ -4,7 +4,7 @@ services:
   main:
     image: nginxproxy/nginx-proxy:1.7
     volumes:
-      - /var/run/docker.sock:/tmp/docker.sock
+      - /var/run/docker.sock:/tmp/docker.sock:ro
     networks:
       - proxy
     ports: