diff --git a/app/blueprints/api/v1/job_blueprint.rb b/app/blueprints/api/v1/job_blueprint.rb
index f58e3e1..ba2c9f1 100644
--- a/app/blueprints/api/v1/job_blueprint.rb
+++ b/app/blueprints/api/v1/job_blueprint.rb
@@ -17,7 +17,9 @@ module Api
         ]
       end
 
-      fields :granblue_id, :row, :master_level, :order, :accessory, :accessory_type
+      fields :granblue_id, :row, :order,
+             :master_level, :ultimate_mastery,
+             :accessory, :accessory_type
     end
   end
 end
diff --git a/app/blueprints/api/v1/party_blueprint.rb b/app/blueprints/api/v1/party_blueprint.rb
index 253d57e..5b26778 100644
--- a/app/blueprints/api/v1/party_blueprint.rb
+++ b/app/blueprints/api/v1/party_blueprint.rb
@@ -71,7 +71,7 @@ module Api
 
         fields :local_id, :description, :charge_attack,
                :button_count, :turn_count, :chain_count,
-               :master_level
+               :master_level, :ultimate_mastery
 
         association :accessory,
                     blueprint: JobAccessoryBlueprint
diff --git a/db/migrate/20230315103026_add_ultimate_mastery.rb b/db/migrate/20230315103026_add_ultimate_mastery.rb
new file mode 100644
index 0000000..149a2a1
--- /dev/null
+++ b/db/migrate/20230315103026_add_ultimate_mastery.rb
@@ -0,0 +1,6 @@
+class AddUltimateMastery < ActiveRecord::Migration[7.0]
+  def change
+    add_column :parties, :ultimate_mastery, :integer, null: true
+    add_column :jobs, :ultimate_mastery, :boolean, default: false, null: false
+  end
+end