diff --git a/alfred-http.rb b/alfred-http.rb
index 42fe248..a120b24 100644
--- a/alfred-http.rb
+++ b/alfred-http.rb
@@ -209,6 +209,12 @@
     :one_liner => "The client should switch to a different protocol",
     :defined_in => "http://tools.ietf.org/html/rfc7231#section-6.5.15",
   },
+  {
+    :status_code => "429",
+    :reason_phrase => "Too Many Requests",
+    :one_liner => "The user has sent too many requests in a given amount of time",
+    :defined_in => "https://tools.ietf.org/html/rfc6585#section-4",
+  }
   {
     :status_code => "500",
     :reason_phrase => "Internal Server Error",