diff --git a/.codeclimate.yml b/.codeclimate.yml
deleted file mode 100644
index 659feca..0000000
--- a/.codeclimate.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-engines:
-  duplication:
-    enabled: true
-    config:
-      languages:
-      - ruby
-  rubocop:
-    enabled: true
-
-ratings:
-  paths:
-    - lib/**
-
-exclude_paths:
-  - spec/**/*
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..5ad7ccd
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,51 @@
+---
+name: test
+on:
+  push:
+    branches:
+      - "*"
+  pull_request:
+    branches:
+      - "*"
+
+jobs:
+  lint:
+    name: RuboCop
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "ruby"
+          bundler-cache: true
+      - name: Run RuboCop
+        run: bundle exec rubocop
+
+  test:
+    name: Ruby ${{ matrix.ruby }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - "2.5"
+          - "2.6"
+          - "2.7"
+          - "3.0"
+          - "3.1"
+          - "3.2"
+          - "3.3"
+          - "3.4"
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+
+      - name: Run tests
+        run: bundle exec rspec
diff --git a/.rubocop.yml b/.rubocop.yml
index 9f426d4..58ec2ae 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,9 +1,19 @@
-Metrics/LineLength:
+inherit_from: .rubocop_todo.yml
+
+AllCops:
+  TargetRubyVersion: 2.5
+  NewCops: enable
+  SuggestExtensions: false
+
+Layout/LineLength:
   Enabled: false
+
 Style/RaiseArgs:
   Enabled: false
+
 Metrics/BlockLength:
   Enabled: false
+
 Style/PercentLiteralDelimiters:
   PreferredDelimiters:
     "%w": "[]"
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..f8be5a6
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,82 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2025-02-15 17:10:47 UTC using RuboCop version 1.72.1.
+# 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: 1
+# This cop supports safe autocorrection (--autocorrect).
+Lint/AmbiguousOperatorPrecedence:
+  Exclude:
+    - 'spec/jwe/alg_spec.rb'
+
+# Offense count: 6
+Lint/DuplicateMethods:
+  Exclude:
+    - 'lib/jwe/enc/aes_cbc_hs.rb'
+    - 'lib/jwe/enc/aes_gcm.rb'
+
+# Offense count: 15
+# Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
+# AllowedNames: as, at, by, cc, db, id, if, in, io, ip, of, on, os, pp, to
+Naming/MethodParameterName:
+  Exclude:
+    - 'lib/jwe/alg/aes_kw.rb'
+    - 'lib/jwe/enc.rb'
+    - 'lib/jwe/enc/aes_cbc_hs.rb'
+    - 'lib/jwe/enc/aes_gcm.rb'
+    - 'lib/jwe/serialization/compact.rb'
+
+# Offense count: 8
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: separated, grouped
+Style/AccessorGrouping:
+  Exclude:
+    - 'lib/jwe/alg/aes_kw.rb'
+    - 'lib/jwe/enc/aes_cbc_hs.rb'
+    - 'lib/jwe/enc/aes_gcm.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+Style/ExpandPathArguments:
+  Exclude:
+    - 'jwe.gemspec'
+
+# Offense count: 34
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, always_true, never
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
+# Offense count: 2
+# This cop supports safe autocorrection (--autocorrect).
+Style/IfUnlessModifier:
+  Exclude:
+    - 'lib/jwe/alg/aes_kw.rb'
+    - 'lib/jwe/enc/aes_cbc_hs.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+Style/PerlBackrefs:
+  Exclude:
+    - 'lib/jwe.rb'
+
+# Offense count: 8
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: Mode.
+Style/StringConcatenation:
+  Exclude:
+    - 'spec/jwe/alg_spec.rb'
+    - 'spec/jwe_spec.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: WordRegex.
+# SupportedStyles: percent, brackets
+Style/WordArray:
+  EnforcedStyle: percent
+  MinSize: 7
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 7ddf6e0..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-language: ruby
-dist: trusty
-rvm:
-  - 2.0.0-p648
-  - 2.1.10
-  - 2.2.7
-  - 2.3.4
-  - 2.4.1
-
-after_script:
-  - bundle exec codeclimate-test-reporter
-
-env:
-  CODECLIMATE_REPO_TOKEN: d9854e6b60cf9cbd78bb8036da0a5c63d6178a14a19a8043752dc5fecec99831
diff --git a/Gemfile b/Gemfile
index fa75df1..a935ba7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,8 @@
 source 'https://rubygems.org'
 
 gemspec
+
+gem 'rake'
+gem 'rspec'
+gem 'rubocop'
+gem 'simplecov'
diff --git a/README.md b/README.md
index 6b15840..ef97516 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,6 @@
 # JWE
 
-[![Build Status](https://travis-ci.org/jwt/ruby-jwe.svg)](https://travis-ci.org/jwt/ruby-jwe)
-[![Code Climate](https://codeclimate.com/github/jwt/ruby-jwe/badges/gpa.svg)](https://codeclimate.com/github/jwt/ruby-jwe)
-[![Test Coverage](https://codeclimate.com/github/jwt/ruby-jwe/badges/coverage.svg)](https://codeclimate.com/github/aomega08/jwe/coverage)
-
+[![Build Status](https://github.com/jwt/ruby-jwe/workflows/test/badge.svg?branch=master)](https://github.com/jwt/ruby-jwe/actions)
 A ruby implementation of the [RFC 7516 JSON Web Encryption (JWE)](https://tools.ietf.org/html/rfc7516) standard.
 
 ## Installing
diff --git a/jwe.gemspec b/jwe.gemspec
index 4838b70..8283ea9 100644
--- a/jwe.gemspec
+++ b/jwe.gemspec
@@ -15,10 +15,6 @@ Gem::Specification.new do |s|
   s.files = `git ls-files`.split("\n")
   s.require_paths = %w[lib]
 
-  s.required_ruby_version = '>= 2.0.0'
-
-  s.add_development_dependency 'rspec'
-  s.add_development_dependency 'rake'
-  s.add_development_dependency 'simplecov'
-  s.add_development_dependency 'codeclimate-test-reporter'
+  s.required_ruby_version = '>= 2.5.0'
+  s.metadata['rubygems_mfa_required'] = 'true'
 end
diff --git a/lib/jwe/version.rb b/lib/jwe/version.rb
index d2604e6..642aeee 100644
--- a/lib/jwe/version.rb
+++ b/lib/jwe/version.rb
@@ -1,3 +1,3 @@
 module JWE
-  VERSION = '0.4.0'.freeze
+  VERSION = '1.0.0'.freeze
 end