diff --git a/app/models/job.rb b/app/models/job.rb
index 52ce307..b1af408 100644
--- a/app/models/job.rb
+++ b/app/models/job.rb
@@ -3,7 +3,7 @@
 class Job < ApplicationRecord
   include PgSearch::Model
 
-  belongs_to :party
+  belongs_to :party, optional: true
   has_many :skills, class_name: 'JobSkill'
 
   multisearchable against: %i[name_en name_jp],