diff --git a/src/index.js b/src/index.js
index 9deb849..aa98528 100644
--- a/src/index.js
+++ b/src/index.js
@@ -37,6 +37,8 @@ function setup(argv) {
     .action(use.handle);
 
   program.parse(argv);
+
+  if (!process.argv.slice(2).length) program.outputHelp();
 }
 
 module.exports = setup;