diff --git a/lib/dry/core/equalizer.rb b/lib/dry/core/equalizer.rb
index a9ab0ac..170c67f 100644
--- a/lib/dry/core/equalizer.rb
+++ b/lib/dry/core/equalizer.rb
@@ -3,6 +3,10 @@
 module Dry
   # Build an equalizer module for the inclusion in other class
   #
+  # ## Credits
+  #
+  # Equalizer has been originally imported from the equalizer gem created by Dan Kubb
+  #
   # @api public
   def self.Equalizer(*keys, **options)
     Dry::Core::Equalizer.new(*keys, **options)