diff --git a/lib/plain_old_model/base.rb b/lib/plain_old_model/base.rb
index <HASH>..<HASH> 100644
--- a/lib/plain_old_model/base.rb
+++ b/lib/plain_old_model/base.rb
@@ -1,7 +1,4 @@
-require 'active_model/naming'
-require 'active_model/translation'
-require 'active_model/validations'
-require 'active_model/conversion'
+require 'active_model'
 require 'plain_old_model/attribute_assignment'
 
 module PlainOldModel
@@ -22,4 +19,4 @@ module PlainOldModel
 
   end
 
-end
\ No newline at end of file
+end
Add Rails 4 compatibility

- In ActiveModel 4, you can no longer require portions of ActiveModel, and instead must require all
  See <URL>