diff --git a/lib/slack.js b/lib/slack.js
index 5de4306e..8546cf01 100644
--- a/lib/slack.js
+++ b/lib/slack.js
@@ -59,9 +59,8 @@ export default class SlackData extends EventEmitter {
     return channel ? channel.id: null
   }
 
-  retry (){
-    let interval = this.interval * 2
-    setTimeout(this.fetch.bind(this), interval)
+  retry (delay = this.interval * 2){
+    setTimeout(this.fetch.bind(this), delay)
     this.emit('retry')
   }
 
@@ -71,6 +70,11 @@ export default class SlackData extends EventEmitter {
       return this.retry()
     }
 
+    // Too Many Requests
+    if (res.status == 429) {
+      return this.retry(res.headers['retry-after'] * 1000)
+    }
+
     let users = res.body.members
 
     if (!users || (users && !users.length)) {