diff --git a/lib/itamae/handler.rb b/lib/itamae/handler.rb
index <HASH>..<HASH> 100644
--- a/lib/itamae/handler.rb
+++ b/lib/itamae/handler.rb
@@ -1,5 +1,4 @@
 require 'itamae/handler/base'
-require 'itamae/handler/debug'
 
 module Itamae
   module Handler
Do not require handler/debug explicitly.