diff --git a/config/application.rb b/config/application.rb
index 0a2d2f1fc..1b22feb12 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -34,7 +34,8 @@ module RedmineApp
     config.active_record.default_timezone = :local
     config.active_record.yaml_column_permitted_classes = [
       Symbol,
-      ActiveSupport::HashWithIndifferentAccess
+      ActiveSupport::HashWithIndifferentAccess,
+      ActionController::Parameters
     ]
 
     config.action_mailer.delivery_job = "ActionMailer::MailDeliveryJob"