diff --git a/nginx-proxy-manager/docker-compose.yaml b/nginx-proxy-manager/docker-compose.yaml
index 663c76a..d06c67c 100644
--- a/nginx-proxy-manager/docker-compose.yaml
+++ b/nginx-proxy-manager/docker-compose.yaml
@@ -6,9 +6,9 @@ services:
     env_file:
       - .env
     ports:
-      - "${NPM_HTTP_PORT}:80"
-      - "${NPM_ADMIN_PORT}:81"
-      - "${NPM_HTTPS_PORT}:443"
+      - "${NPM_HTTP_PORT:-80}:80"
+      - "${NPM_ADMIN_PORT:-81}:81"
+      - "${NPM_HTTPS_PORT:-443}:443"
     volumes:
       - ${NGINX_DATA}:/data
       - ${NGINX_LETSENCRYPT}:/etc/letsencrypt