diff --git a/lib/her/model/associations/association_proxy.rb b/lib/her/model/associations/association_proxy.rb
index 36bd2243..e03d230f 100644
--- a/lib/her/model/associations/association_proxy.rb
+++ b/lib/her/model/associations/association_proxy.rb
@@ -1,7 +1,7 @@
 module Her
   module Model
     module Associations
-      class AssociationProxy < (ActiveSupport.const_defined?('ProxyObject') ? ActiveSupport::ProxyObject : ActiveSupport::BasicObject)
+      class AssociationProxy < BasicObject
 
         # @private
         def self.install_proxy_methods(target_name, *names)