diff --git a/lib/rack/attack.rb b/lib/rack/attack.rb
index 26b6725..8066622 100644
--- a/lib/rack/attack.rb
+++ b/lib/rack/attack.rb
@@ -50,11 +50,11 @@ class Rack::Attack
     end
 
     def blocklist_ip(ip_address)
-      anonymous_blocklists << Blocklist.new(nil) { |request| IPAddr.new(ip_address).include?(IPAddr.new(request.ip)) }
+      anonymous_blocklists << Blocklist.new { |request| IPAddr.new(ip_address).include?(IPAddr.new(request.ip)) }
     end
 
     def safelist_ip(ip_address)
-      anonymous_safelists << Safelist.new(nil) { |request| IPAddr.new(ip_address).include?(IPAddr.new(request.ip)) }
+      anonymous_safelists << Safelist.new { |request| IPAddr.new(ip_address).include?(IPAddr.new(request.ip)) }
     end
 
     def throttle(name, options, &block)
diff --git a/lib/rack/attack/blocklist.rb b/lib/rack/attack/blocklist.rb
index bd7fa11..08adcc6 100644
--- a/lib/rack/attack/blocklist.rb
+++ b/lib/rack/attack/blocklist.rb
@@ -3,7 +3,7 @@
 module Rack
   class Attack
     class Blocklist < Check
-      def initialize(name, &block)
+      def initialize(name = nil, &block)
         super
         @type = :blocklist
       end
diff --git a/lib/rack/attack/safelist.rb b/lib/rack/attack/safelist.rb
index 0bd1453..b3abeaf 100644
--- a/lib/rack/attack/safelist.rb
+++ b/lib/rack/attack/safelist.rb
@@ -3,7 +3,7 @@
 module Rack
   class Attack
     class Safelist < Check
-      def initialize(name, &block)
+      def initialize(name = nil, &block)
         super
         @type = :safelist
       end