diff --git a/README.md b/README.md
index d6d53e1..c4970aa 100644
--- a/README.md
+++ b/README.md
@@ -73,9 +73,9 @@ def call(env)
   if whitelisted?(req)
     @app.call(env)
   elsif blacklisted?(req)
-    blacklisted_response[env]
+    self.class.blacklisted_response.call(env)
   elsif throttled?(req)
-    throttled_response[env]
+    self.class.throttled_response.call(env)
   else
     tracked?(req)
     @app.call(env)
diff --git a/lib/rack/attack.rb b/lib/rack/attack.rb
index 4dab44d..dd4d1b0 100644
--- a/lib/rack/attack.rb
+++ b/lib/rack/attack.rb
@@ -96,9 +96,9 @@ class Rack::Attack
     if whitelisted?(req)
       @app.call(env)
     elsif blacklisted?(req)
-      self.class.blacklisted_response[env]
+      self.class.blacklisted_response.call(env)
     elsif throttled?(req)
-      self.class.throttled_response[env]
+      self.class.throttled_response.call(env)
     else
       tracked?(req)
       @app.call(env)