diff --git a/lib/docs/scrapers/async.rb b/lib/docs/scrapers/async.rb
index c33d3a77..58b0cc95 100644
--- a/lib/docs/scrapers/async.rb
+++ b/lib/docs/scrapers/async.rb
@@ -1,7 +1,7 @@
 module Docs
   class Async < UrlScraper
     self.type = 'async'
-    self.release = '2.1.5'
+    self.release = '2.2.0'
     self.base_url = 'https://caolan.github.io/async/'
     self.root_path = 'docs.html'
     self.links = {