diff --git a/.rubocop.yml b/.rubocop.yml
index d01e468..f3705f5 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,33 +2,10 @@ inherit_from:
   - https://raw.githubusercontent.com/thoughtbot/guides/master/style/ruby/.rubocop.yml
 
 AllCops:
+  TargetRubyVersion: 2.3
   Exclude:
     - "tmp/**/*"
     - "gemfiles/*"
 
 Style/EmptyMethod:
   EnforcedStyle: expanded
-
-# TODO:
-# This configuration was generated by
-# `rubocop --auto-gen-config`
-# on 2018-09-17 20:19:38 -0400 using RuboCop version 0.54.0.
-# The point is for the user to remove these configuration records
-# one by one as the offenses are removed from the code base.
-# Note that changes in the inspected code, or installation of new
-# versions of RuboCop, may require this file to be generated again.
-
-# Offense count: 4
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: auto_detection, squiggly, active_support, powerpack, unindent
-Layout/IndentHeredoc:
-  Exclude:
-    - 'features/step_definitions/rails_steps.rb'
-    - 'lib/generators/factory_bot/model/model_generator.rb'
-
-# Offense count: 11
-# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
-# URISchemes: http, https
-Metrics/LineLength:
-  Max: 133
diff --git a/features/step_definitions/appraisal.rb b/features/step_definitions/appraisal.rb
index 94dade4..eef03c7 100644
--- a/features/step_definitions/appraisal.rb
+++ b/features/step_definitions/appraisal.rb
@@ -1,5 +1,5 @@
 When /^I run `([^"]+)` with a clean environment$/ do |command|
-  step %{I successfully run `ruby -e 'system({"BUNDLE_GEMFILE" => nil, "DISABLE_SPRING" => "true"}, "#{command}")'`}
+  step <<~STEP
+    I successfully run `ruby -e 'system({"BUNDLE_GEMFILE" => nil, "DISABLE_SPRING" => "true"}, "#{command}")'`
+  STEP
 end
-
-# system({'BUNDLE_GEMFILE' => nil}, "cd tmp/aruba/testapp && #{command} && cd -")
diff --git a/features/step_definitions/rails_steps.rb b/features/step_definitions/rails_steps.rb
index 92b0177..9170b09 100644
--- a/features/step_definitions/rails_steps.rb
+++ b/features/step_definitions/rails_steps.rb
@@ -15,20 +15,20 @@
 end
 
 When /^I configure the factories as:$/ do |string|
-  append_to_file File.join("config", "application.rb"), <<-RUBY
-class Testapp::Application
-  #{string}
-end
+  append_to_file File.join("config", "application.rb"), <<~RUBY
+    class Testapp::Application
+      #{string}
+    end
   RUBY
 end
 
 When /^I configure the factories directory as "([^"]+)"$/ do |factory_dir|
-  append_to_file File.join("config", "application.rb"), <<-RUBY
-class Testapp::Application
-  config.generators do |g|
-    g.fixture_replacement :factory_bot, :dir => "#{factory_dir}"
-  end
-end
+  append_to_file File.join("config", "application.rb"), <<~RUBY
+    class Testapp::Application
+      config.generators do |g|
+        g.fixture_replacement :factory_bot, :dir => "#{factory_dir}"
+      end
+    end
   RUBY
 end
 
diff --git a/features/support/env.rb b/features/support/env.rb
index 80ac5fb..d234143 100644
--- a/features/support/env.rb
+++ b/features/support/env.rb
@@ -1,6 +1,7 @@
 require "aruba/cucumber"
 
-PROJECT_ROOT = File.expand_path(File.join(File.dirname(__FILE__), "..", "..")).freeze
+PROJECT_ROOT =
+  File.expand_path(File.join(File.dirname(__FILE__), "..", "..")).freeze
 
 Aruba.configure do |config|
   config.exit_timeout = Integer ENV.fetch("ARUBA_TIMEOUT") { 120 }
@@ -8,15 +9,19 @@
 
 if RUBY_PLATFORM == "java"
   Aruba.configure do |config|
-    config.before_cmd do |_|
-      set_env("JRUBY_OPTS", "-X-C #{ENV['JRUBY_OPTS']}") # disable JIT since these processes are so short lived
+    config.before_cmd do
+      # disable JIT since these processes are so short lived
+      set_env("JRUBY_OPTS", "-X-C #{ENV['JRUBY_OPTS']}")
 
       java_options = ENV["JAVA_OPTS"]
 
       if 1.size == 4 # 4 for 32 bit java, 8 for 64 bit java.
         set_env("JAVA_OPTS", "-d32 #{java_options}")
       else
-        set_env("JAVA_OPTS", "-XX:+TieredCompilation -XX:TieredStopAtLevel=1 #{java_options}")
+        set_env(
+          "JAVA_OPTS",
+          "-XX:+TieredCompilation -XX:TieredStopAtLevel=1 #{java_options}",
+        )
       end
     end
   end
diff --git a/lib/factory_bot_rails/generators/non_rspec_generator.rb b/lib/factory_bot_rails/generators/non_rspec_generator.rb
index 0aa7d5d..7d2d770 100644
--- a/lib/factory_bot_rails/generators/non_rspec_generator.rb
+++ b/lib/factory_bot_rails/generators/non_rspec_generator.rb
@@ -6,7 +6,11 @@ def initialize(generators)
       end
 
       def run
-        @generators.test_framework test_framework, fixture: false, fixture_replacement: :factory_bot
+        @generators.test_framework(
+          test_framework,
+          fixture: false,
+          fixture_replacement: :factory_bot,
+        )
       end
 
       private
diff --git a/lib/factory_bot_rails/generators/rspec_generator.rb b/lib/factory_bot_rails/generators/rspec_generator.rb
index 9718b77..96dde63 100644
--- a/lib/factory_bot_rails/generators/rspec_generator.rb
+++ b/lib/factory_bot_rails/generators/rspec_generator.rb
@@ -6,7 +6,10 @@ def initialize(generators)
       end
 
       def run
-        @generators.fixture_replacement fixture_replacement_setting, dir: factory_bot_directory
+        @generators.fixture_replacement(
+          fixture_replacement_setting,
+          dir: factory_bot_directory,
+        )
       end
 
       private
@@ -16,7 +19,11 @@ def fixture_replacement_setting
       end
 
       def factory_bot_directory
-        @generators.options.fetch(:factory_bot, {}).fetch(:dir, "spec/factories")
+        factory_bot_options.fetch(:dir, "spec/factories")
+      end
+
+      def factory_bot_options
+        @generators.options.fetch(:factory_bot, {})
       end
     end
   end
diff --git a/lib/generators/factory_bot.rb b/lib/generators/factory_bot.rb
index 650e79b..7a80f45 100644
--- a/lib/generators/factory_bot.rb
+++ b/lib/generators/factory_bot.rb
@@ -4,11 +4,20 @@ module FactoryBot
   module Generators
     class Base < Rails::Generators::NamedBase #:nodoc:
       def self.source_root
-        File.expand_path(File.join(File.dirname(__FILE__), "factory_bot", generator_name, "templates"))
+        path = File.join(
+          File.dirname(__FILE__),
+          "factory_bot",
+          generator_name,
+          "templates",
+        )
+
+        File.expand_path(path)
       end
 
       def explicit_class_option
-        ", class: '#{class_name}'" unless class_name == singular_table_name.camelize
+        return if class_name == singular_table_name.camelize
+
+        ", class: '#{class_name}'"
       end
     end
   end
diff --git a/lib/generators/factory_bot/model/model_generator.rb b/lib/generators/factory_bot/model/model_generator.rb
index 2e6ed96..1abb4d1 100644
--- a/lib/generators/factory_bot/model/model_generator.rb
+++ b/lib/generators/factory_bot/model/model_generator.rb
@@ -53,18 +53,18 @@ def create_factory_file
       end
 
       def factory_definition
-        <<-RUBY
-  factory :#{singular_table_name}#{explicit_class_option} do
-#{factory_attributes.gsub(/^/, '    ')}
-  end
+        <<~RUBY
+            factory :#{singular_table_name}#{explicit_class_option} do
+          #{factory_attributes.gsub(/^/, '    ')}
+            end
         RUBY
       end
 
       def single_file_factory_definition
-        <<-RUBY
-FactoryBot.define do
-#{factory_definition.chomp}
-end
+        <<~RUBY
+          FactoryBot.define do
+          #{factory_definition.chomp}
+          end
         RUBY
       end