diff --git a/lib/public_activity/config.rb b/lib/public_activity/config.rb
index 203aec13..3f8a61e5 100644
--- a/lib/public_activity/config.rb
+++ b/lib/public_activity/config.rb
@@ -47,6 +47,12 @@ def table_name(name = nil)
       self.class.table_name(name)
     end
 
+    # alias for {#owner_options}
+    # @see Config#owner_options
+    def owner_options(owner_options = {})
+      self.class.owner_options(owner_options)
+    end
+
     # instance version of {Config#enabled}
     # @see Config#orm
     def enabled(value = nil)
@@ -79,6 +85,14 @@ def self.enabled(value = nil)
       end
     end
 
+    def self.owner_options(owner_options = {})
+      if owner_options.blank?
+        Thread.current[:owner_options] || { :polymorphic => true }
+      else
+        Thread.current[:owner_options] = owner_options
+      end
+    end
+
     # Provides simple DSL for the config block.
     class Block
       # @see Config#orm
diff --git a/lib/public_activity/orm/active_record/activity.rb b/lib/public_activity/orm/active_record/activity.rb
index 7ec55a5d..4cfc32c7 100644
--- a/lib/public_activity/orm/active_record/activity.rb
+++ b/lib/public_activity/orm/active_record/activity.rb
@@ -28,7 +28,7 @@ class Activity < ::ActiveRecord::Base
 
         with_options(optional: true) do
           # Define ownership to a resource responsible for this activity
-          belongs_to :owner, polymorphic: true
+          belongs_to :owner, PublicActivity.config.owner_options
           # Define ownership to a resource targeted by this activity
           belongs_to :recipient, polymorphic: true
         end
diff --git a/lib/public_activity/orm/mongo_mapper/activity.rb b/lib/public_activity/orm/mongo_mapper/activity.rb
index 40b37b40..4bb511c1 100644
--- a/lib/public_activity/orm/mongo_mapper/activity.rb
+++ b/lib/public_activity/orm/mongo_mapper/activity.rb
@@ -21,7 +21,7 @@ def self.from_mongo(value)
         # Define polymorphic association to the parent
         belongs_to :trackable,  polymorphic: true
         # Define ownership to a resource responsible for this activity
-        belongs_to :owner,      polymorphic: true
+        belongs_to :owner,      PublicActivity.config.owner_options
         # Define ownership to a resource targeted by this activity
         belongs_to :recipient,  polymorphic: true
 
diff --git a/lib/public_activity/orm/mongoid/activity.rb b/lib/public_activity/orm/mongoid/activity.rb
index 1969abed..c39e2305 100644
--- a/lib/public_activity/orm/mongoid/activity.rb
+++ b/lib/public_activity/orm/mongoid/activity.rb
@@ -14,15 +14,17 @@ class Activity
         include Renderable
 
         if ::Mongoid::VERSION.split('.')[0].to_i >= 7
-          opts = { polymorphic: true, optional: false }
+          extra_options = { optional: false }
         else
-          opts = { polymorphic: true }
+          extra_options = {}
         end
 
+        opts = { polymorphic: true }.merge(extra_options)
+
         # Define polymorphic association to the parent
         belongs_to :trackable,  opts
         # Define ownership to a resource responsible for this activity
-        belongs_to :owner,      opts
+        belongs_to :owner,      PublicActivity.config.owner_options.merge(extra_options)
         # Define ownership to a resource targeted by this activity
         belongs_to :recipient,  opts
 
diff --git a/test/test_activity.rb b/test/test_activity.rb
index 0c30aec5..6bafa963 100644
--- a/test/test_activity.rb
+++ b/test/test_activity.rb
@@ -2,7 +2,30 @@
 
 require 'test_helper'
 
-describe 'PublicActivity::Activity Rendering' do
+describe 'PublicActivity::Activity' do
+  it "allows owner association options to be overwritten" do
+    PublicActivity::Config.owner_options({ class_name: "User" })
+
+    klass = Class.new(PublicActivity::Activity)
+    klass.must_respond_to :owner
+    case ENV["PA_ORM"]
+      when "active_record"
+        klass.reflect_on_association(:owner).options[:polymorphic].must_equal wont_be_nil
+      when "mongoid"
+        klass.reflect_on_association(:owner).options[:polymorphic].must_equal nil
+      when "mongo_mapper"
+        klass.reflect_on_association(:owner).options[:polymorphic].must_equal nil
+    end
+
+    if ENV["PA_ORM"] == "mongo_mapper"
+      klass.associations[:owner].options[:class_name].must_equal "User"
+    else
+      klass.reflect_on_association(:owner).options[:class_name].must_equal "User"
+    end
+
+    PublicActivity::Config.owner_options({ polymorphic: true })
+  end
+
   describe '#text' do
     subject { PublicActivity::Activity.new(key: 'activity.test', parameters: { one: 1 }) }