diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..9255d48
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,10 @@
+---
+inherit_gem:
+  standard: config/base.yml
+
+AllCops:
+  NewCops: enable
+
+require:
+  - rubocop-rspec
+  - standard
diff --git a/.standard.yml b/.standard.yml
new file mode 100644
index 0000000..9ad641e
--- /dev/null
+++ b/.standard.yml
@@ -0,0 +1,5 @@
+# For available configuration options, see:
+#   https://github.com/testdouble/standard
+ignore:
+  - "spec/dummy/**/*"
+ruby_version: 2.6
diff --git a/Gemfile b/Gemfile
index 72f5e35..ad6b028 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,3 +16,5 @@ gem "sprockets-rails"
 gem "rspec-rails", "~> 6.1"
 
 gem "standard", "~> 1.32"
+
+gem "rubocop-rspec", "~> 2.25"
diff --git a/Rakefile b/Rakefile
index 416b023..19430bb 100644
--- a/Rakefile
+++ b/Rakefile
@@ -6,3 +6,10 @@ load "rails/tasks/engine.rake"
 load "rails/tasks/statistics.rake"
 
 require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+require "standard/rake"
+
+task default: %i[spec]
diff --git a/bin/rake b/bin/rake
new file mode 100755
index 0000000..4eb7d7b
--- /dev/null
+++ b/bin/rake
@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'rake' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+bundle_binstub = File.expand_path("bundle", __dir__)
+
+if File.file?(bundle_binstub)
+  if File.read(bundle_binstub, 300).include?("This file was generated by Bundler")
+    load(bundle_binstub)
+  else
+    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
+Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
+  end
+end
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("rake", "rake")
diff --git a/bin/rubocop b/bin/rubocop
new file mode 100755
index 0000000..369a05b
--- /dev/null
+++ b/bin/rubocop
@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'rubocop' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+bundle_binstub = File.expand_path("bundle", __dir__)
+
+if File.file?(bundle_binstub)
+  if File.read(bundle_binstub, 300).include?("This file was generated by Bundler")
+    load(bundle_binstub)
+  else
+    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
+Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
+  end
+end
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("rubocop", "rubocop")
diff --git a/cognito_idp_rails.gemspec b/cognito_idp_rails.gemspec
index df9d944..77d7271 100644
--- a/cognito_idp_rails.gemspec
+++ b/cognito_idp_rails.gemspec
@@ -9,6 +9,7 @@ Gem::Specification.new do |spec|
   spec.summary = "Simple Rails integration for Amazon Cognito IdP (User Pools)"
   spec.description = "Simple Rails integration for authentication through Amazon Cognito IdP (User Pools)"
   spec.license = "MIT"
+  spec.required_ruby_version = ">= 2.6.0"
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = spec.homepage
diff --git a/spec/cognito_idp_rails/configuration_spec.rb b/spec/cognito_idp_rails/configuration_spec.rb
index 66f3652..375321d 100644
--- a/spec/cognito_idp_rails/configuration_spec.rb
+++ b/spec/cognito_idp_rails/configuration_spec.rb
@@ -7,7 +7,7 @@
     subject(:after_login_route) { configuration.after_login_route }
 
     it "defaults to /" do
-      is_expected.to eq("/")
+      expect(subject).to eq("/")
     end
 
     context "when specified" do
@@ -25,7 +25,7 @@
     subject(:after_logout_route) { configuration.after_logout_route }
 
     it "defaults to /" do
-      is_expected.to eq("/")
+      expect(subject).to eq("/")
     end
 
     context "when specified" do
diff --git a/spec/routing/mapper_extensions_spec.rb b/spec/routing/mapper_extensions_spec.rb
index e054050..83e6aca 100644
--- a/spec/routing/mapper_extensions_spec.rb
+++ b/spec/routing/mapper_extensions_spec.rb
@@ -1,10 +1,6 @@
 require "rails_helper"
 
 RSpec.describe CognitoIdpRails::Routing::MapperExtensions, type: :routing do
-  it "defines cognito_idp method" do
-    expect(ActionDispatch::Routing::Mapper.new(ActionDispatch::Routing::RouteSet.new)).to respond_to(:cognito_idp)
-  end
-
   before do
     Rails.application.routes.draw do
       cognito_idp
@@ -12,6 +8,10 @@
     Rails.application.reload_routes!
   end
 
+  it "defines cognito_idp method" do
+    expect(ActionDispatch::Routing::Mapper.new(ActionDispatch::Routing::RouteSet.new)).to respond_to(:cognito_idp)
+  end
+
   it "adds login route" do
     expect(Rails.application.routes.recognize_path("/login")).to match(controller: "cognito_idp_rails/sessions", action: "login")
   end