diff --git a/lib/cli.js b/lib/cli.js
index 777a4a3..81e23f0 100644
--- a/lib/cli.js
+++ b/lib/cli.js
@@ -94,7 +94,7 @@ require('yargs')
           alias: 'c',
           default: false,
           desc: chalk.gray(y18n.__('start.config')),
-          nargs: 0,
+          nargs: 1,
           requiresArg: false,
           type: 'string'
         },