diff --git a/app.js b/app.js
index b6e69c1..771b7c2 100644
--- a/app.js
+++ b/app.js
@@ -21,7 +21,7 @@ const App = React.createClass({
   },
 
   inputIsValid () {
-    return url.parse(this.state.slack).host === 'hooks.slack.com'
+    return url.parse(this.state.slack || '').host === 'hooks.slack.com'
   },
 
   render () {
diff --git a/package.json b/package.json
index 0d7187a..82a6f7d 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "isomorphic-fetch": "^2.1.1",
     "menubar": "^2.1.2",
     "once": "^1.3.2",
-    "playback": "^0.2.0",
+    "playback": "pastak/playback",
     "react": "^0.13.3"
   },
   "devDependencies": {