diff --git a/spec/factories/fluentd.rb b/spec/factories/fluentd.rb
index ceccc65..aff33b9 100644
--- a/spec/factories/fluentd.rb
+++ b/spec/factories/fluentd.rb
@@ -1,4 +1,4 @@
-FactoryGirl.define do
+FactoryBot.define do
   factory :fluentd do
     dir = Rails.root.join("tmp/fluentd-test").to_s
     FileUtils.mkdir_p(dir)
diff --git a/spec/factories/plugins.rb b/spec/factories/plugins.rb
index 94e9cb5..010699b 100644
--- a/spec/factories/plugins.rb
+++ b/spec/factories/plugins.rb
@@ -1,6 +1,6 @@
-# Read about factories at https://github.com/thoughtbot/factory_girl
+# Read about factories at https://github.com/thoughtbot/factory_bot
 
-FactoryGirl.define do
+FactoryBot.define do
   factory :plugin do
     gem_name "fluent-plugin-dummy"
     version "1.2.3"
diff --git a/spec/factories/user.rb b/spec/factories/user.rb
index d691850..e5f5e63 100644
--- a/spec/factories/user.rb
+++ b/spec/factories/user.rb
@@ -1,4 +1,4 @@
-FactoryGirl.define do
+FactoryBot.define do
   factory :user do
     name "admin"
     password "changeme"
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 7364240..a57ff68 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -27,8 +27,8 @@ RSpec.configure do |config|
   # config.mock_with :flexmock
   # config.mock_with :rr
 
-  # Syntax sugar to use the FactoryGirl methods directly instead FactoryGirl.create ete.
-  config.include FactoryGirl::Syntax::Methods
+  # Syntax sugar to use the FactoryBot methods directly instead FactoryBot.create ete.
+  config.include FactoryBot::Syntax::Methods
   config.include LoginMacro
   config.include JavascriptMacro
   config.include StubDaemon