diff --git a/index.js b/index.js
index f0e2889..5004990 100644
--- a/index.js
+++ b/index.js
@@ -46,14 +46,6 @@ function budoCLI (args, opts) {
     argv.livePort = parseInt(argv.livePort, 10)
   }
 
-  // port and livePort must be valid numbers
-  if (isNaN(argv.port)) {
-    delete argv.port
-  }
-  if (isNaN(argv.livePort)) {
-    delete argv.livePort
-  }
-
   // opts.live can be a glob or a boolean
   if (typeof argv.live === 'string' && /(true|false)/.test(argv.live)) {
     argv.live = argv.live === 'true'