diff --git a/json/bin.json b/json/bin.json
index 8cfaa73b..d018fe00 100644
--- a/json/bin.json
+++ b/json/bin.json
@@ -7,7 +7,7 @@
     "-u, --username "   : "set username",
     "-p, --password "   : "set password",
     "-c, --config   "   : "configuration file path",
-    "--root"            : "set root folder",
+    "--root         "   : "set root folder",
     "--port         "   : "set port number",
     "--no-auth      "   : "disable authorization",
     "--no-server    "   : "do not start server",