diff --git a/bot.js b/bot.js
index 4ef85b7..7e5ae7b 100644
--- a/bot.js
+++ b/bot.js
@@ -7,6 +7,10 @@ var CHANNEL = process.env.CHANNEL;
 if (!SLACK_TOKEN) {
     throw new Error('SLACK_TOKEN env var required');
 }
+if (!CHANNEL) {
+    throw new Error('CHANNEL env var required');
+}
+
 
 var bot = new SlackBot({
     token: SLACK_TOKEN,
@@ -50,4 +54,4 @@ bot.on('start', function() {
     // Post every hour
     setInterval(getData, 3600000);
     getData();
-});
\ No newline at end of file
+});