diff --git a/app/controllers/concerns/setting_concern.rb b/app/controllers/concerns/setting_concern.rb
index c633601..1a2eb42 100644
--- a/app/controllers/concerns/setting_concern.rb
+++ b/app/controllers/concerns/setting_concern.rb
@@ -50,7 +50,7 @@ module SettingConcern
   private
 
   def setting_params
-    params.require(target_class.to_s.underscore.gsub("/", "_")).permit(*target_class.permit_params)
+    params.require(:setting).permit(*target_class.permit_params)
   end
 
   def initial_params
diff --git a/app/views/shared/settings/_form.html.haml b/app/views/shared/settings/_form.html.haml
index d81f899..9fcf435 100644
--- a/app/views/shared/settings/_form.html.haml
+++ b/app/views/shared/settings/_form.html.haml
@@ -1,7 +1,7 @@
 = render "shared/setting_errors"
 
 - # NOTE: plugin_setting_form_action_url is defined at SettingConcern
-= form_with(model: @setting, url: plugin_setting_form_action_url(@fluentd), class: "ignore-rails-error-div", builder: FluentdFormBuilder) do |form|
+= form_with(model: @setting, scope: :setting, url: plugin_setting_form_action_url(@fluentd), class: "ignore-rails-error-div", builder: FluentdFormBuilder) do |form|
   - @setting.common_options.each do |key|
     = form.field(key)