diff --git a/package.json b/package.json
index a939d7fd3487b8e4f4218e97ff7d288088d1c8f5..6051497af46e1bbfb3b57d95c7baac1f4a241a76 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "lint": "eslint src test",
     "pretest": "npm run lint",
-    "start": "node bin/io-bot.js",
+    "start": "node bin/io-bot",
     "demo": "node example/ding-dong-bot.js",
     "test": "cross-env TAP_TIMEOUT=600 tap --reporter=tap test/{*,**/*}.spec.js"
   },
diff --git a/src/puppet-web/browser.js b/src/puppet-web/browser.js
index 48b77cd5e54d9c770b4e225455fbdde94f4bb685..59df50c805d261e88ac479359c1c6a4feb415d0f 100644
--- a/src/puppet-web/browser.js
+++ b/src/puppet-web/browser.js
@@ -26,7 +26,7 @@ class Browser extends EventEmitter {
   } = {}) {
     super()
     log.verbose('PuppetWebBrowser', 'constructor()')
-    this.head = head || false
+    this.head = String(head).toLowerCase() || false
     this.sessionFile = sessionFile // a file to save session cookies
 
     this.live = false