diff --git a/slack-pixiv.rb b/slack-pixiv.rb
index f5bbb2e..40013bc 100644
--- a/slack-pixiv.rb
+++ b/slack-pixiv.rb
@@ -3,6 +3,7 @@ require 'wolfram'
 require 'mechanize'
 require 'nokogiri'
 require 'cgi'
+require 'resolv-replace'
 require 'slack-pixiv/commands/illust'
 require 'slack-pixiv/commands/member'
 require 'slack-pixiv/app'