diff --git a/middleman-core/lib/middleman-core/extension.rb b/middleman-core/lib/middleman-core/extension.rb
index 1ac42d1e..0ad3b6ca 100644
--- a/middleman-core/lib/middleman-core/extension.rb
+++ b/middleman-core/lib/middleman-core/extension.rb
@@ -1,3 +1,6 @@
+require 'active_support/core_ext/class/attribute'
+require 'active_support/core_ext/module/delegation'
+
 module Middleman
   class Extension
     class_attribute :supports_multiple_instances, :instance_reader => false, :instance_writer => false
diff --git a/middleman-core/lib/middleman-core/extensions.rb b/middleman-core/lib/middleman-core/extensions.rb
index 7cfbec45..b6981657 100644
--- a/middleman-core/lib/middleman-core/extensions.rb
+++ b/middleman-core/lib/middleman-core/extensions.rb
@@ -1,6 +1,3 @@
-require 'active_support/core_ext/class/attribute'
-require 'active_support/core_ext/module/delegation'
-
 module Middleman
 
   module Extensions