diff --git a/docs/config/config.sample.json b/docs/config/config.sample.json
index fcdf032b0..cb4673928 100644
--- a/docs/config/config.sample.json
+++ b/docs/config/config.sample.json
@@ -41,7 +41,7 @@
                 "password": "yoursecret",
                 "token": "",
                 "secure": false,
-                "pingInterval": 0
+                "pingInterval": 0,
                 "streaming": {
                     "enable": false,
                     "clusterID": "",