diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a7c084bc9..72e5b0db2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,7 +2,7 @@
 # This is a generated file by the `rake build_matrix:github:generate` task.
 # See `build_matrix.yml` for the build matrix.
 # Generate this file with `rake build_matrix:github:generate`.
-# Generated job count: 127
+# Generated job count: 151
 ---
 name: Ruby gem CI
 'on':
@@ -73,6 +73,658 @@ jobs:
       working-directory: spec/integration/diagnose
       env:
         LANGUAGE: ruby
+  ruby_3-4-0-preview2_ubuntu-latest:
+    name: Ruby 3.4.0-preview2
+    needs: validation
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    - name: Run tests without extension
+      run: "./script/bundler_wrapper exec rake test:failure"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/no_dependencies.gemfile
+  ruby_3-4-0-preview2__capistrano2_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - capistrano2
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/capistrano2.gemfile
+  ruby_3-4-0-preview2__capistrano3_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - capistrano3
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/capistrano3.gemfile
+  ruby_3-4-0-preview2__dry-monitor_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - dry-monitor
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/dry-monitor.gemfile
+  ruby_3-4-0-preview2__grape_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - grape
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/grape.gemfile
+  ruby_3-4-0-preview2__hanami-2-0_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - hanami-2.0
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/hanami-2.0.gemfile
+  ruby_3-4-0-preview2__hanami-2-1_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - hanami-2.1
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/hanami-2.1.gemfile
+  ruby_3-4-0-preview2__hanami-2-2_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - hanami-2.2
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/hanami-2.2.gemfile
+  ruby_3-4-0-preview2__http5_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - http5
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/http5.gemfile
+  ruby_3-4-0-preview2__padrino_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - padrino
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/padrino.gemfile
+  ruby_3-4-0-preview2__psych-3_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - psych-3
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/psych-3.gemfile
+  ruby_3-4-0-preview2__psych-4_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - psych-4
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/psych-4.gemfile
+  ruby_3-4-0-preview2__que-1_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - que-1
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/que-1.gemfile
+  ruby_3-4-0-preview2__que-2_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - que-2
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/que-2.gemfile
+  ruby_3-4-0-preview2__rails-7-0_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - rails-7.0
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/rails-7.0.gemfile
+  ruby_3-4-0-preview2__rails-7-1_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - rails-7.1
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/rails-7.1.gemfile
+  ruby_3-4-0-preview2__rails-7-2_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - rails-7.2
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/rails-7.2.gemfile
+  ruby_3-4-0-preview2__rails-8-0_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - rails-8.0
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/rails-8.0.gemfile
+  ruby_3-4-0-preview2__sequel_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - sequel
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/sequel.gemfile
+  ruby_3-4-0-preview2__sinatra_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - sinatra
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/sinatra.gemfile
+  ruby_3-4-0-preview2__webmachine2_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - webmachine2
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/webmachine2.gemfile
+  ruby_3-4-0-preview2__redis-4_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - redis-4
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/redis-4.gemfile
+  ruby_3-4-0-preview2__redis-5_ubuntu-latest:
+    name: Ruby 3.4.0-preview2 - redis-5
+    needs: ruby_3-4-0-preview2_ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/redis-5.gemfile
+  ruby_3-4-0-preview2_macos-14:
+    name: Ruby 3.4.0-preview2 (macos-14)
+    needs: validation
+    runs-on: macos-14
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+    - name: Install Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.0-preview2
+        bundler-cache: true
+    - name: Install gem extension
+      run: "./script/bundler_wrapper exec rake extension:install"
+    - name: Print extension install report
+      run: "[ -e ext/install.report ] && cat ext/install.report || echo 'No ext/install.report
+        file found'"
+    - name: Print Makefile log file
+      run: "[ -f ext/mkmf.log ] && cat ext/mkmf.log || echo 'No ext/mkmf.log file
+        found'"
+    - name: Run tests
+      run: "./script/bundler_wrapper exec rake test"
+    - name: Run tests without extension
+      run: "./script/bundler_wrapper exec rake test:failure"
+    env:
+      RAILS_ENV: test
+      JRUBY_OPTS: ''
+      COV: '1'
+      BUNDLE_GEMFILE: gemfiles/no_dependencies.gemfile
   ruby_3-3-4_ubuntu-latest:
     name: Ruby 3.3.4
     needs: validation
diff --git a/.gitignore b/.gitignore
index 02468430a..38740be92 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,4 +33,5 @@ ext/*.bundle
 ext/*.o
 ext/*.so
 ext/*.report
+ext/*.bundle.dSYM
 pkg/
diff --git a/build_matrix.yml b/build_matrix.yml
index ac02c1297..0a2526e47 100644
--- a/build_matrix.yml
+++ b/build_matrix.yml
@@ -88,6 +88,7 @@ matrix:
       - "rails-8.0"
 
   ruby:
+    - ruby: "3.4.0-preview2"
     - ruby: "3.3.4"
     - ruby: "3.2.5"
     - ruby: "3.1.6"
@@ -102,6 +103,7 @@ matrix:
     - gem: "dry-monitor"
       only:
         ruby:
+          - "3.4.0-preview2"
           - "3.3.4"
           - "3.2.5"
           - "3.1.6"
@@ -110,6 +112,7 @@ matrix:
     - gem: "hanami-2.0"
       only:
         ruby:
+          - "3.4.0-preview2"
           - "3.3.4"
           - "3.2.5"
           - "3.1.6"
@@ -117,6 +120,7 @@ matrix:
     - gem: "hanami-2.1"
       only:
         ruby:
+          - "3.4.0-preview2"
           - "3.3.4"
           - "3.2.5"
           - "3.1.6"
@@ -124,6 +128,7 @@ matrix:
     - gem: "hanami-2.2"
       only:
         ruby:
+          - "3.4.0-preview2"
           - "3.3.4"
           - "3.2.5"
           - "3.1.6"
@@ -132,6 +137,7 @@ matrix:
     - gem: "psych-3"
       only:
         ruby:
+          - "3.4.0-preview2"
           - "3.3.4"
           - "3.2.5"
           - "3.1.6"
@@ -140,6 +146,7 @@ matrix:
     - gem: "psych-4"
       only:
         ruby:
+          - "3.4.0-preview2"
           - "3.3.4"
           - "3.2.5"
           - "3.1.6"
@@ -165,6 +172,7 @@ matrix:
     - gem: "rails-7.0"
       only:
         ruby:
+          - "3.4.0-preview2"
           - "3.3.4"
           - "3.2.5"
           - "3.1.6"
@@ -174,6 +182,7 @@ matrix:
     - gem: "rails-7.1"
       only:
         ruby:
+          - "3.4.0-preview2"
           - "3.3.4"
           - "3.2.5"
           - "3.1.6"
@@ -182,6 +191,7 @@ matrix:
     - gem: "rails-7.2"
       only:
         ruby:
+          - "3.4.0-preview2"
           - "3.3.4"
           - "3.2.5"
           - "3.1.6"
@@ -189,6 +199,7 @@ matrix:
     - gem: "rails-8.0"
       only:
         ruby:
+          - "3.4.0-preview2"
           - "3.3.4"
           - "3.2.5"
     - gem: "sequel"
diff --git a/gemfiles/padrino.gemfile b/gemfiles/padrino.gemfile
index 0fdca1790..8e55c7b20 100644
--- a/gemfiles/padrino.gemfile
+++ b/gemfiles/padrino.gemfile
@@ -1,7 +1,8 @@
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
-gem 'padrino', "~> 0.15"
-gem 'rack', "~> 2"
-gem 'sinatra', "~> 2"
+gem "base64" # Ruby 3.4 requirement
+gem "padrino", "~> 0.15"
+gem "rack", "~> 2"
+gem "sinatra", "~> 2"
 
-gemspec :path => '../'
+gemspec :path => "../"
diff --git a/gemfiles/rails-7.0.gemfile b/gemfiles/rails-7.0.gemfile
index 281d1fb21..c56f12731 100644
--- a/gemfiles/rails-7.0.gemfile
+++ b/gemfiles/rails-7.0.gemfile
@@ -1,5 +1,8 @@
 source "https://rubygems.org"
 
+gem "base64" # Ruby 3.4 requirement
+gem "drb" # Ruby 3.4 requirement
+gem "mutex_m" # Ruby 3.4 requirement
 gem "rails", "~> 7.0.1"
 gem "rake", "> 12.2"
 gem "sidekiq"
diff --git a/gemfiles/webmachine2.gemfile b/gemfiles/webmachine2.gemfile
index 6fb0d70bf..308e64058 100644
--- a/gemfiles/webmachine2.gemfile
+++ b/gemfiles/webmachine2.gemfile
@@ -1,5 +1,6 @@
 source "https://rubygems.org"
 
+gem "mutex_m" # Ruby 3.4 requirement
 gem "webmachine", "~> 2.0"
 gem "webrick"
 
diff --git a/lib/appsignal/probes/sidekiq.rb b/lib/appsignal/probes/sidekiq.rb
index f8b89af15..629ab75b6 100644
--- a/lib/appsignal/probes/sidekiq.rb
+++ b/lib/appsignal/probes/sidekiq.rb
@@ -59,7 +59,11 @@ def initialize(config = {})
         is_sidekiq7 = self.class.sidekiq7_and_greater?
         @adapter = is_sidekiq7 ? Sidekiq7Adapter : Sidekiq6Adapter
 
-        config_string = " with config: #{config}" unless config.empty?
+        unless config.empty?
+          formatted_config =
+            config.map { |key, value| "#{key}: #{value.inspect}" }.join(", ")
+          config_string = " with config: #{formatted_config}"
+        end
         Appsignal.internal_logger.debug("Initializing Sidekiq probe#{config_string}")
         require "sidekiq/api"
       end
diff --git a/spec/lib/appsignal/event_formatter/elastic_search/search_formatter_spec.rb b/spec/lib/appsignal/event_formatter/elastic_search/search_formatter_spec.rb
index 62a8c0fc2..d3913e341 100644
--- a/spec/lib/appsignal/event_formatter/elastic_search/search_formatter_spec.rb
+++ b/spec/lib/appsignal/event_formatter/elastic_search/search_formatter_spec.rb
@@ -18,9 +18,15 @@
     end
 
     it "should return a payload with name and sanitized body" do
+      query =
+        if DependencyHelper.ruby_3_4_or_newer?
+          "{index: \"users\", type: \"user\", q: \"?\"}"
+        else
+          "{:index=>\"users\", :type=>\"user\", :q=>\"?\"}"
+        end
       expect(formatter.format(payload)).to eql([
         "Search: User",
-        "{:index=>\"users\", :type=>\"user\", :q=>\"?\"}"
+        query
       ])
     end
   end
diff --git a/spec/lib/appsignal/probes/sidekiq_spec.rb b/spec/lib/appsignal/probes/sidekiq_spec.rb
index ca461b5ce..d58fca7d0 100644
--- a/spec/lib/appsignal/probes/sidekiq_spec.rb
+++ b/spec/lib/appsignal/probes/sidekiq_spec.rb
@@ -312,7 +312,7 @@ def with_sidekiq6!
         log = capture_logs { probe }
         expect(log).to contains_log(
           :debug,
-          %(Initializing Sidekiq probe with config: {:hostname=>"#{redis_hostname}"})
+          %(Initializing Sidekiq probe with config: hostname: "#{redis_hostname}")
         )
         log = capture_logs { probe.call }
         expect(log).to contains_log(
diff --git a/spec/lib/appsignal/utils/data_spec.rb b/spec/lib/appsignal/utils/data_spec.rb
index 15c2921d1..0ab316d92 100644
--- a/spec/lib/appsignal/utils/data_spec.rb
+++ b/spec/lib/appsignal/utils/data_spec.rb
@@ -108,7 +108,11 @@ def generate(object)
 
           it "casts unsupported key types to string" do
             expect(generate([1, 2] => "abc").to_s).to eq(%({"[1, 2]":"abc"}))
-            expect(generate({ :a => "b" } => "abc").to_s).to eq(%({"{:a=>\\"b\\"}":"abc"}))
+            if DependencyHelper.ruby_3_4_or_newer?
+              expect(generate({ :a => "b" } => "abc").to_s).to eq(%({"{a: \\"b\\"}":"abc"}))
+            else
+              expect(generate({ :a => "b" } => "abc").to_s).to eq(%({"{:a=>\\"b\\"}":"abc"}))
+            end
           end
         end
       end
diff --git a/spec/support/helpers/dependency_helper.rb b/spec/support/helpers/dependency_helper.rb
index ed2bd821b..42be09b22 100644
--- a/spec/support/helpers/dependency_helper.rb
+++ b/spec/support/helpers/dependency_helper.rb
@@ -17,6 +17,10 @@ def ruby_3_2_or_newer?
     ruby_version >= Gem::Version.new("3.2.0")
   end
 
+  def ruby_3_4_or_newer?
+    ruby_version >= Gem::Version.new("3.4.0")
+  end
+
   def running_jruby?
     Appsignal::System.jruby?
   end