diff --git a/lib/active_model/serializer.rb b/lib/active_model/serializer.rb
index 8909bb79..e77ddfd5 100644
--- a/lib/active_model/serializer.rb
+++ b/lib/active_model/serializer.rb
@@ -1,16 +1,16 @@
 require 'thread_safe'
+require 'active_model/serializer/adapter'
+require 'active_model/serializer/array_serializer'
+require 'active_model/serializer/associations'
+require 'active_model/serializer/configuration'
+require 'active_model/serializer/fieldset'
+require 'active_model/serializer/lint'
+require 'active_model/serializer/utils'
 
 module ActiveModel
   class Serializer
     extend ActiveSupport::Autoload
 
-    autoload :Configuration
-    autoload :ArraySerializer
-    autoload :Adapter
-    autoload :Lint
-    autoload :Associations
-    autoload :Fieldset
-    autoload :Utils
     include Configuration
     include Associations