diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1729d18..3de66f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,8 +33,8 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        ruby-version: ['3.2', '3.3', '3.4']
-        rails-version: ['7.2', '8.0']
+        ruby-version: ['3.2', '3.3', '3.4', '4.0']
+        rails-version: ['7.2', '8.0', '8.1']
     runs-on: ${{ matrix.os }}
     env:
       RAILS_VERSION: "${{ matrix.rails-version }}"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5662539..5780cf9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,11 @@ may consider to be a bug might be behavior a consumer relies upon in their proje
 
 ## Unreleased
 
+### Added
+
+- Added support for Rails 8.1.
+- Added support for Ruby 4.0.
+
 [Unreleased commits](https://github.com/bfad/scrapbook/compare/v0.4.0...HEAD)
 
 ## 0.4.0
diff --git a/Gemfile b/Gemfile
index a83a604..b3a538f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,7 +15,7 @@ gem 'rails-controller-testing'
 gem 'rspec'
 gem 'rspec-rails'
 
-gem 'rubocop', '~> 1.26', require: false
+gem 'rubocop', '1.52.1', require: false
 gem 'rubocop-performance', require: false
 gem 'rubocop-rails', require: false
 gem 'rubocop-rspec', require: false
diff --git a/scrapbook.gemspec b/scrapbook.gemspec
index f81603d..87c1cee 100644
--- a/scrapbook.gemspec
+++ b/scrapbook.gemspec
@@ -22,5 +22,5 @@ Gem::Specification.new do |spec|
   end
 
   spec.required_ruby_version = '>= 2.7.0'
-  spec.add_dependency 'rails', '>= 6.1', '< 8.1'
+  spec.add_dependency 'rails', '>= 6.1', '< 8.2'
 end