diff --git a/app/models/project.rb b/app/models/project.rb
index 5cb92fa95..9fe40bfb2 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -18,7 +18,7 @@ class Project < ApplicationRecord
   has_one :project_score, dependent: :destroy
   has_one :repository, dependent: :destroy
   has_many :pull_requests, dependent: :destroy
-
+  has_many :issue_tags, dependent: :destroy
   has_many :issues, dependent: :destroy
   has_many :user_grades, dependent: :destroy
   has_many :attachments, as: :container, dependent: :destroy