diff --git a/lib/rack/attack.rb b/lib/rack/attack.rb
index 4bfe33c..0ec982c 100644
--- a/lib/rack/attack.rb
+++ b/lib/rack/attack.rb
@@ -73,7 +73,7 @@ class Rack::Attack
     end
 
     def clear!
-      @whitelists, @blacklists, @throttles = {}, {}, {}
+      @whitelists, @blacklists, @throttles, @tracks = {}, {}, {}, {}
     end
 
   end