diff --git a/src/bin/Service.hx b/src/bin/Service.hx
index f7dc628..870e43d 100644
--- a/src/bin/Service.hx
+++ b/src/bin/Service.hx
@@ -40,7 +40,7 @@ class Service extends CLIAppBase {
 
             var result = ServiceManager.instance.register(name, binName, rest);
             return handleResult(result);
-        },"<name> <binary> <args...>");
+        },"<name> <binary> [args...]");
 
         registerSyncSubcommand("unregister", (args) ->{
             if (args.length < 2) {