diff --git a/README.md b/README.md
index 0db0418..e4b1e8d 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,9 @@ Use `FROM %%BASE_IMAGE%%` inside your docker file. We use alpine linux 3.5 for a
   "description": "long descripton",
   "startup": "before|after|once",
   "boot": "auto|manual",
-  "ports": {"123/tcp", 123},
+  "ports": {
+    "123/tcp": 123
+   },
   "map_config": "bool",
   "map_ssl": "bool",
   "options": {},