diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index a294284..5773a99 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -46,7 +46,7 @@ class ApplicationController < ActionController::Base
   private
 
   def find_fluentd
-    @fluentd = Fluentd.factory
+    @fluentd = Fluentd.instance
   end
 
   def set_locale
diff --git a/app/controllers/fluentd_controller.rb b/app/controllers/fluentd_controller.rb
index 580f3b2..f478b2f 100644
--- a/app/controllers/fluentd_controller.rb
+++ b/app/controllers/fluentd_controller.rb
@@ -46,7 +46,7 @@ class FluentdController < ApplicationController
   private
 
   def find_fluentd
-    @fluentd = Fluentd.factory
+    @fluentd = Fluentd.instance
   end
 
   def fluentd_params
diff --git a/app/controllers/tutorials_controller.rb b/app/controllers/tutorials_controller.rb
index c80cdbe..8eee849 100644
--- a/app/controllers/tutorials_controller.rb
+++ b/app/controllers/tutorials_controller.rb
@@ -27,7 +27,7 @@ class TutorialsController < ApplicationController
   end
 
   def find_fluentd
-    @fluentd = Fluentd.factory
+    @fluentd = Fluentd.instance
   end
 
   def check_ready
diff --git a/app/models/fluentd.rb b/app/models/fluentd.rb
index c4e31e2..f319f92 100644
--- a/app/models/fluentd.rb
+++ b/app/models/fluentd.rb
@@ -123,7 +123,7 @@ class Fluentd
 
   # ActiveRecord mimic
 
-  def self.factory
+  def self.instance
     return unless exists?
     attr = JSON.parse(File.read(JSON_PATH))
     Fluentd.new(attr)