diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..7d86a37e
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,90 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    name: Ruby ${{ matrix.ruby }} / Rails ${{ matrix.rails }}
+    runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.rails == 'main' }}
+    timeout-minutes: 20
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - ruby: "2.2"
+            rails: "4.2"
+            bundler: "1.17.3"
+          - ruby: "2.3"
+            rails: "4.2"
+            bundler: "1.17.3"
+          - ruby: "2.4"
+            rails: "4.2"
+            bundler: "1.17.3"
+          - ruby: "2.5"
+            rails: "4.2"
+            bundler: "1.17.3"
+          - ruby: "2.3"
+            rails: "5.2"
+          - ruby: "2.4"
+            rails: "5.2"
+          - ruby: "2.5"
+            rails: "5.2"
+          - ruby: "2.5"
+            rails: "6.0"
+          - ruby: "2.7"
+            rails: "6.0"
+          - ruby: "2.5"
+            rails: "6.1"
+          - ruby: "3.1"
+            rails: "6.1"
+          - ruby: "2.7"
+            rails: "7.0"
+          - ruby: "3.2"
+            rails: "7.0"
+          - ruby: "2.7"
+            rails: "7.1"
+          - ruby: "3.3"
+            rails: "7.1"
+          - ruby: "3.1"
+            rails: "7.2"
+          - ruby: "4.0"
+            rails: "7.2"
+          - ruby: "3.2"
+            rails: "8.0"
+          - ruby: "4.0"
+            rails: "8.0"
+          - ruby: "3.2"
+            rails: "8.1"
+          - ruby: "4.0"
+            rails: "8.1"
+          - ruby: "4.0"
+            rails: main
+
+    env:
+      RAILS_VERSION: ${{ matrix.rails }}
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v7
+        with:
+          persist-credentials: false
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler: ${{ matrix.bundler || 'default' }}
+          bundler-cache: true
+
+      - name: Set up test database
+        run: bundle exec rake app:db:setup
+
+      - name: Run specs
+        run: bundle exec rake spec
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index c3fc35f6..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-language: ruby
-
-env:
-  - "RAILS_VERSION=4.2"
-  - "RAILS_VERSION=5.2"
-  - "RAILS_VERSION=master"
-
-rvm:
-  - 2.3.8
-  - 2.4.5
-  - 2.5.3
-
-matrix:
-  fast_finish: true
-  allow_failures:
-    - env: "RAILS_VERSION=master"
-  include:
-    - rvm: 2.2
-      env: RAILS_VERSION=4.2
-
-before_install:
-  - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
-  - gem install bundler -v '< 2'
-
-before_script:
-  - bundle exec rake app:db:setup
-
-script: bundle exec rake spec
diff --git a/Gemfile b/Gemfile
index 810ce296..11f34419 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,22 +6,45 @@ gemspec
 rails_version = ENV["RAILS_VERSION"] || "default"
 
 rails = case rails_version
-        when "master"
-          {github: "rails/rails"}
+        when "main"
+          {github: "rails/rails", branch: "main"}
         when "default"
           "~> 5.2"
         else
-          "~> #{rails_version}"
+          requirement = rails_version.split('.').length == 2 ? "#{rails_version}.0" : rails_version
+          "~> #{requirement}"
         end
 
 gem "rails", rails
 
-if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('2.2.0')
+ruby_version = Gem::Version.new(RUBY_VERSION)
+
+if ruby_version >= Gem::Version.new('2.2.0')
   gem "test-unit", "~> 3.0"
 end
 
+if ruby_version < Gem::Version.new('2.3.0')
+  gem 'nokogiri', '~> 1.8.5'
+elsif ruby_version < Gem::Version.new('2.5.0')
+  gem 'nokogiri', '~> 1.10.10'
+elsif ruby_version < Gem::Version.new('2.6.0')
+  gem 'nokogiri', '~> 1.12.5'
+end
+
+gem 'loofah', '< 2.21' if ruby_version < Gem::Version.new('2.5.0')
+gem 'psych', '< 5' if rails_version == '7.1' && ruby_version < Gem::Version.new('3.0.0')
+
 group :test, :development do
-  gem 'sqlite3'
+  gem 'ostruct' if ruby_version >= Gem::Version.new('4.0.0')
+  case rails_version
+  when '4.2'
+    gem 'sqlite3', '~> 1.3.6'
+  when 'default', '5.2', '6.0', '6.1', '7.0'
+    gem 'sqlite3', '~> 1.4'
+  else
+    gem 'sqlite3'
+  end
+  gem 'sprockets-rails'
 end
 
 group :test do
diff --git a/lib/two_factor_authentication/models/two_factor_authenticatable.rb b/lib/two_factor_authentication/models/two_factor_authenticatable.rb
index 6d73a0fb..ea1955b7 100644
--- a/lib/two_factor_authentication/models/two_factor_authenticatable.rb
+++ b/lib/two_factor_authentication/models/two_factor_authenticatable.rb
@@ -44,7 +44,7 @@ def authenticate_totp(code, options = {})
             drift_ahead: drift, drift_behind: drift, after: totp_timestamp
           )
           return false unless new_timestamp
-          self.totp_timestamp = new_timestamp
+          self.totp_timestamp = Time.at(new_timestamp).utc
           true
         end
 
@@ -101,7 +101,7 @@ def generate_totp_secret
         def create_direct_otp(options = {})
           # Create a new random OTP and store it in the database
           digits = options[:length] || self.class.direct_otp_length || 6
-          update_attributes(
+          update(
             direct_otp: random_base10(digits),
             direct_otp_sent_at: Time.now.utc
           )
@@ -122,7 +122,7 @@ def direct_otp_expired?
         end
 
         def clear_direct_otp
-          update_attributes(direct_otp: nil, direct_otp_sent_at: nil)
+          update(direct_otp: nil, direct_otp_sent_at: nil)
         end
       end
 
diff --git a/lib/two_factor_authentication/routes.rb b/lib/two_factor_authentication/routes.rb
index 543059a2..5e5442ba 100644
--- a/lib/two_factor_authentication/routes.rb
+++ b/lib/two_factor_authentication/routes.rb
@@ -3,7 +3,7 @@ class Mapper
     protected
 
       def devise_two_factor_authentication(mapping, controllers)
-        resource :two_factor_authentication, :only => [:show, :update, :resend_code], :path => mapping.path_names[:two_factor_authentication], :controller => controllers[:two_factor_authentication] do
+        resource :two_factor_authentication, :only => [:show, :update], :path => mapping.path_names[:two_factor_authentication], :controller => controllers[:two_factor_authentication] do
           collection { get "resend_code" }
         end
       end
diff --git a/spec/generators/active_record/two_factor_authentication_generator_spec.rb b/spec/generators/active_record/two_factor_authentication_generator_spec.rb
index 5a8989d0..1c9957b9 100644
--- a/spec/generators/active_record/two_factor_authentication_generator_spec.rb
+++ b/spec/generators/active_record/two_factor_authentication_generator_spec.rb
@@ -1,9 +1,10 @@
 require 'spec_helper'
+require 'tmpdir'
 
 require 'generators/active_record/two_factor_authentication_generator'
 
 describe ActiveRecord::Generators::TwoFactorAuthenticationGenerator, type: :generator do
-  destination File.expand_path('../../../../../tmp', __FILE__)
+  destination File.join(Dir.tmpdir, 'two_factor_authentication_generator')
 
   before do
     prepare_destination
@@ -23,7 +24,7 @@
     describe 'the migration' do
       subject { migration_file('db/migrate/two_factor_authentication_add_to_users.rb') }
 
-      it { is_expected.to exist }
+      it { is_expected.to satisfy { |path| File.exist?(path) } }
       it { is_expected.to be_a_migration }
       it { is_expected.to contain /def change/ }
       it { is_expected.to contain /add_column :users, :second_factor_attempts_count, :integer, default: 0/ }
diff --git a/spec/lib/two_factor_authentication/models/two_factor_authenticatable_spec.rb b/spec/lib/two_factor_authentication/models/two_factor_authenticatable_spec.rb
index 6fb4f505..3cf6f90d 100644
--- a/spec/lib/two_factor_authentication/models/two_factor_authenticatable_spec.rb
+++ b/spec/lib/two_factor_authentication/models/two_factor_authenticatable_spec.rb
@@ -137,8 +137,13 @@ def instance.send_two_factor_authentication_code(code)
         end
 
         it "returns uri with user's email" do
-          expect(instance.provisioning_uri).
-            to match(%r{otpauth://totp/houdini@example.com\?secret=\w{32}})
+          uri = URI.parse(instance.provisioning_uri)
+          params = URI.decode_www_form(uri.query).to_h
+
+          expect(uri.scheme).to eq('otpauth')
+          expect(uri.host).to eq('totp')
+          expect(URI.decode_www_form_component(uri.path)).to eq('/houdini@example.com')
+          expect(params['secret']).to match(/\w{32}/)
         end
 
         it 'returns uri with issuer option' do
@@ -147,15 +152,14 @@ def instance.send_two_factor_authentication_code(code)
         end
 
         it 'returns uri with issuer option' do
-          require 'cgi'
           uri = URI.parse(instance.provisioning_uri('houdini', issuer: 'Magic'))
-          params = CGI.parse(uri.query)
+          params = URI.decode_www_form(uri.query).to_h
 
           expect(uri.scheme).to eq('otpauth')
           expect(uri.host).to eq('totp')
-          expect(uri.path).to eq('/Magic:houdini')
-          expect(params['issuer'].shift).to eq('Magic')
-          expect(params['secret'].shift).to match(/\w{32}/)
+          expect(URI.decode_www_form_component(uri.path)).to eq('/Magic:houdini')
+          expect(params['issuer']).to eq('Magic')
+          expect(params['secret']).to match(/\w{32}/)
         end
       end
     end
diff --git a/spec/rails_app/app/assets/config/manifest.js b/spec/rails_app/app/assets/config/manifest.js
new file mode 100644
index 00000000..21a78805
--- /dev/null
+++ b/spec/rails_app/app/assets/config/manifest.js
@@ -0,0 +1,2 @@
+//= link_directory ../javascripts .js
+//= link_directory ../stylesheets .css
diff --git a/spec/rails_app/app/models/guest_user.rb b/spec/rails_app/app/models/guest_user.rb
index 8003624c..1222279a 100644
--- a/spec/rails_app/app/models/guest_user.rb
+++ b/spec/rails_app/app/models/guest_user.rb
@@ -7,7 +7,7 @@ class GuestUser
   attr_accessor :direct_otp, :direct_otp_sent_at, :otp_secret_key, :email,
     :second_factor_attempts_count, :totp_timestamp
 
-  def update_attributes(attrs)
+  def update(attrs)
     attrs.each do |key, value|
       send(key.to_s + '=', value)
     end
diff --git a/spec/rails_app/config/application.rb b/spec/rails_app/config/application.rb
index 2d31d588..729fd66e 100644
--- a/spec/rails_app/config/application.rb
+++ b/spec/rails_app/config/application.rb
@@ -1,3 +1,4 @@
+require 'logger'
 require File.expand_path('../boot', __FILE__)
 
 require "active_record/railtie"
@@ -60,4 +61,3 @@ class Application < Rails::Application
     config.secret_key_base = 'secretvalue'
   end
 end
-
diff --git a/spec/rails_app/config/initializers/inflections.rb b/spec/rails_app/config/initializers/inflections.rb
index 5d8d9be2..1d5e5332 100644
--- a/spec/rails_app/config/initializers/inflections.rb
+++ b/spec/rails_app/config/initializers/inflections.rb
@@ -13,3 +13,7 @@
 # ActiveSupport::Inflector.inflections do |inflect|
 #   inflect.acronym 'RESTful'
 # end
+
+ActiveSupport::Inflector.inflections do |inflect|
+  inflect.acronym 'SMS'
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 63704333..189d5844 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,5 +1,6 @@
 ENV["RAILS_ENV"] ||= "test"
 require File.expand_path("../rails_app/config/environment.rb",  __FILE__)
+require File.expand_path("../rails_app/lib/sms_provider.rb", __FILE__)
 
 require 'rspec/rails'
 require 'timecop'
diff --git a/two_factor_authentication.gemspec b/two_factor_authentication.gemspec
index 9580f117..98d5b99c 100644
--- a/two_factor_authentication.gemspec
+++ b/two_factor_authentication.gemspec
@@ -34,7 +34,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'bundler'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec-rails', '>= 3.0.1'
-  s.add_development_dependency 'capybara', '~> 2.5'
+  s.add_development_dependency 'capybara', '>= 2.5', '< 4'
   s.add_development_dependency 'pry'
   s.add_development_dependency 'timecop'
 end