diff --git a/lib/docs.rb b/lib/docs.rb
index 825d5c5a..b31dcf7e 100644
--- a/lib/docs.rb
+++ b/lib/docs.rb
@@ -1,6 +1,7 @@
 require 'bundler/setup'
 Bundler.require :docs
 
+require 'active_support'
 require 'active_support/core_ext'
 I18n.enforce_available_locales = true