diff --git a/lib/rex.rb b/lib/rex.rb
index b82d8c8..d46dd06 100644
--- a/lib/rex.rb
+++ b/lib/rex.rb
@@ -1,8 +1,10 @@
 # frozen_string_literal: true
 
 require_relative "rex/version"
+require_relative "rex/limit"
+require_relative "rex/order"
+require_relative "rex/order_book"
 
 module Rex
   class Error < StandardError; end
-  # Your code goes here...
 end