diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index a6d8ed8..8894b15 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -17,9 +17,9 @@ jobs:
       - name: Install the correct Ruby version
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.5
+          ruby-version: 2.7
           bundler-cache: true
-          rubygems: '3.3.26'
+          rubygems: '3.4.22'
 
       - name: Prepare the virtual environment
         uses: hausgold/actions/ci@master
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 7cf61fb..363bb30 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,12 +20,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install Ruby 2.5
+      - name: Install Ruby 2.7
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.5
+          ruby-version: 2.7
           bundler-cache: true
-          rubygems: '3.3.26'
+          rubygems: '3.4.22'
 
       - name: Prepare the virtual environment
         uses: hausgold/actions/ci@master
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c5f1452..20b0d6b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,8 +18,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['2.5', '2.7']
-        rails: ['5.2']
+        ruby: ['2.7']
+        rails: ['5.2', '6.1', '7.1']
     env:
       BUNDLE_GEMFILE: 'gemfiles/rails_${{ matrix.rails }}.gemfile'
     steps:
@@ -30,7 +30,7 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
-          rubygems: '3.3.26'
+          rubygems: '3.4.22'
 
       - name: Prepare the virtual environment
         uses: hausgold/actions/ci@master
diff --git a/.gitignore b/.gitignore
index 040524f..81d25b0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@
 /pkg/
 /spec/reports/
 /tmp/
+/log/
 /vendor/
 /gemfiles/vendor/
 /Gemfile.lock
diff --git a/.rubocop.yml b/.rubocop.yml
index a7212c9..27d7ea2 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -12,7 +12,7 @@ AllCops:
   NewCops: enable
   SuggestExtensions: false
   DisplayCopNames: true
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 2.7
   TargetRailsVersion: 5.2
   Exclude:
     - bin/**/*
diff --git a/Appraisals b/Appraisals
index ebd48d2..4d93f65 100644
--- a/Appraisals
+++ b/Appraisals
@@ -3,3 +3,11 @@
 appraise 'rails-5.2' do
   gem 'rails', '~> 5.2.0'
 end
+
+appraise 'rails-6.1' do
+  gem 'rails', '~> 6.1.0'
+end
+
+appraise 'rails-7.1' do
+  gem 'rails', '~> 7.1.0'
+end
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b742b00..a7bffde 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 ### next
 
-* TODO: Replace this bullet point with an actual description of a change.
+* Dropped support for Ruby <2.7 (#20)
 
 ### 1.1.5
 
diff --git a/Dockerfile b/Dockerfile
index def923e..13ccce4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,8 @@
-FROM hausgold/ruby:2.5
+FROM hausgold/ruby:2.7
 MAINTAINER Hermann Mayer <hermann.mayer@hausgold.de>
 
 # Update system gem
-RUN gem update --system '3.3.26'
+RUN gem update --system '3.4.22'
 
 # Install system packages and the latest bundler
 RUN apt-get update -yqqq && \
@@ -11,7 +11,7 @@ RUN apt-get update -yqqq && \
     ca-certificates \
     bash-completion inotify-tools && \
   echo 'en_US.UTF-8 UTF-8' >> /etc/locale.gen && /usr/sbin/locale-gen && \
-  gem install bundler -v '~> 2.3.0' --no-document --no-prerelease
+  gem install bundler -v '~> 2.4.22' --no-document --no-prerelease
 
 # Add new web user
 RUN mkdir /app && \
diff --git a/Makefile b/Makefile
index f297618..d8e7767 100644
--- a/Makefile
+++ b/Makefile
@@ -120,7 +120,7 @@ test-style: \
 test-style-ruby:
 	# Run the static code analyzer (rubocop)
 	@$(call run-shell,$(BUNDLE) exec $(RUBOCOP) -a \
-		|| ($(TEST) $$($(RUBY_VERSION)) != '2.5' && true))
+		|| ($(TEST) $$($(RUBY_VERSION)) != '2.7' && true))
 
 clean:
 	# Clean the dependencies
diff --git a/app/controllers/factory_bot/instrumentation/root_controller.rb b/app/controllers/factory_bot/instrumentation/root_controller.rb
index a99c12a..8eb4a9d 100644
--- a/app/controllers/factory_bot/instrumentation/root_controller.rb
+++ b/app/controllers/factory_bot/instrumentation/root_controller.rb
@@ -96,7 +96,7 @@ def instrumentation
       #
       # @return [Hash{String => Array}] the grouped scenarios
       def scenarios
-        res = (instrumentation['scenarios'] || [])
+        res = instrumentation['scenarios'] || []
         res.each_with_object({}) do |scenario, memo|
           group = scenario_group(scenario['name'])
           scenario['group'] = group
diff --git a/config/docker/.bashrc b/config/docker/.bashrc
index 6884dc6..4942fcf 100644
--- a/config/docker/.bashrc
+++ b/config/docker/.bashrc
@@ -16,7 +16,9 @@ sudo sed -i 's/autostart=.*/autostart=false/g' /etc/supervisor/conf.d/*
 sudo supervisord >/dev/null 2>&1 &
 
 # Wait for supervisord
-while ! supervisorctl status >/dev/null 2>&1; do sleep 1; done
+while ! (sudo supervisorctl status | grep avahi) >/dev/null 2>&1; do
+  sleep 1
+done
 
 # Boot the mDNS stack
 echo '# Start the mDNS stack'
diff --git a/factory_bot_instrumentation.gemspec b/factory_bot_instrumentation.gemspec
index 915865a..3ce8c2f 100644
--- a/factory_bot_instrumentation.gemspec
+++ b/factory_bot_instrumentation.gemspec
@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
   spec.executables = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.5'
+  spec.required_ruby_version = '>= 2.7'
 
   # TODO: Remove the upper lock when
   #       https://github.com/thoughtbot/factory_bot/issues/1614 is solved.
diff --git a/gemfiles/rails_6.1.gemfile b/gemfiles/rails_6.1.gemfile
new file mode 100644
index 0000000..14fecc3
--- /dev/null
+++ b/gemfiles/rails_6.1.gemfile
@@ -0,0 +1,22 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4"
+gem "bundler", "~> 2.3"
+gem "countless", "~> 1.1"
+gem "factory_bot_rails", "~> 6.2"
+gem "guard-rspec", "~> 4.7"
+gem "railties", ">= 5.2"
+gem "rspec-rails", "~> 5.1"
+gem "rubocop", "~> 1.28"
+gem "rubocop-rails", "~> 2.14"
+gem "rubocop-rspec", "~> 2.10"
+gem "simplecov", ">= 0.22"
+gem "sqlite3", "~> 1.5"
+gem "timecop", ">= 0.9.6"
+gem "yard", ">= 0.9.28"
+gem "yard-activesupport-concern", ">= 0.0.1"
+gem "rails", "~> 6.1.0"
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7.1.gemfile b/gemfiles/rails_7.1.gemfile
new file mode 100644
index 0000000..5045b46
--- /dev/null
+++ b/gemfiles/rails_7.1.gemfile
@@ -0,0 +1,22 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal", "~> 2.4"
+gem "bundler", "~> 2.3"
+gem "countless", "~> 1.1"
+gem "factory_bot_rails", "~> 6.2"
+gem "guard-rspec", "~> 4.7"
+gem "railties", ">= 5.2"
+gem "rspec-rails", "~> 5.1"
+gem "rubocop", "~> 1.28"
+gem "rubocop-rails", "~> 2.14"
+gem "rubocop-rspec", "~> 2.10"
+gem "simplecov", ">= 0.22"
+gem "sqlite3", "~> 1.5"
+gem "timecop", ">= 0.9.6"
+gem "yard", ">= 0.9.28"
+gem "yard-activesupport-concern", ">= 0.0.1"
+gem "rails", "~> 7.1.0"
+
+gemspec path: "../"
diff --git a/spec/controllers/factory_bot/instrumentation/root_controller_spec.rb b/spec/controllers/factory_bot/instrumentation/root_controller_spec.rb
index 92bff1c..184ba1f 100644
--- a/spec/controllers/factory_bot/instrumentation/root_controller_spec.rb
+++ b/spec/controllers/factory_bot/instrumentation/root_controller_spec.rb
@@ -93,12 +93,12 @@ def main_app
 
       it 'responds the error' do
         action
-        expect(body['error']).to be_eql(%(Factory not registered: "admin"))
+        expect(body['error']).to eql(%(Factory not registered: "admin"))
       end
 
       it 'responds the application name' do
         action
-        expect(body['application']).to be_eql('Dummy')
+        expect(body['application']).to eql('Dummy')
       end
 
       context 'with custom error handling' do
@@ -118,7 +118,7 @@ def main_app
 
         it 'responds the error message' do
           action
-          expect(body['error']).to be_eql(%(Factory not registered: "admin"))
+          expect(body['error']).to eql(%(Factory not registered: "admin"))
         end
       end
     end
@@ -141,7 +141,7 @@ def main_app
 
       it 'create a new user with the default first name' do
         action
-        expect(User.last.first_name).to be_eql('Max')
+        expect(User.last.first_name).to eql('Max')
       end
     end
 
@@ -163,7 +163,7 @@ def main_app
 
       it 'create a new user with the correct first name' do
         action
-        expect(User.last.first_name).to be_eql('Bernd')
+        expect(User.last.first_name).to eql('Bernd')
       end
 
       context 'with custom renderer' do
@@ -177,7 +177,7 @@ def main_app
         end
 
         it 'uses the custom renderer' do
-          expect(response.body).to be_eql('{"test":true}')
+          expect(response.body).to eql('{"test":true}')
         end
       end
 
@@ -193,7 +193,7 @@ def main_app
 
         context 'when unauthenticated' do
           it 'responds the 401 status code' do
-            expect(response.status).to be_eql(401)
+            expect(response).to have_http_status(:unauthorized)
           end
         end
 
@@ -203,7 +203,7 @@ def main_app
           end
 
           it 'responds the 200 status code' do
-            expect(response.status).to be_eql(200)
+            expect(response).to have_http_status(:ok)
           end
         end
       end
@@ -229,7 +229,7 @@ def main_app
       let(:name) { 'UX Testcase #1' }
 
       it 'returns the correct group name' do
-        expect(action).to be_eql('UX Scenarios')
+        expect(action).to eql('UX Scenarios')
       end
     end
 
@@ -237,7 +237,7 @@ def main_app
       let(:name) { 'Fancy Testcase #1' }
 
       it 'returns the correct group name' do
-        expect(action).to be_eql('Various')
+        expect(action).to eql('Various')
       end
     end
   end
diff --git a/spec/factory_bot/instrumentation/engine/with_factory_bot_rails_spec.rb b/spec/factory_bot/instrumentation/engine/with_factory_bot_rails_spec.rb
index 53f1dfd..20bdc09 100644
--- a/spec/factory_bot/instrumentation/engine/with_factory_bot_rails_spec.rb
+++ b/spec/factory_bot/instrumentation/engine/with_factory_bot_rails_spec.rb
@@ -3,6 +3,9 @@
 ENV['FACTORY_BOT_RAILS'] = 'true'
 require 'spec_helper'
 
+# rubocop:disable RSpec/SpecFilePathFormat because we have to split the spec
+#   into multiple files to stub the availability of the +factory_bot_rails+ gem
+#   properly
 RSpec.describe FactoryBot::Instrumentation::Engine do
   context 'with factory_bot_rails' do
     it 'does not raise' do
@@ -10,3 +13,4 @@
     end
   end
 end
+# rubocop:enable RSpec/SpecFilePathFormat
diff --git a/spec/factory_bot/instrumentation/engine/without_factory_bot_rails_spec.rb b/spec/factory_bot/instrumentation/engine/without_factory_bot_rails_spec.rb
index 1e22919..0c98a77 100644
--- a/spec/factory_bot/instrumentation/engine/without_factory_bot_rails_spec.rb
+++ b/spec/factory_bot/instrumentation/engine/without_factory_bot_rails_spec.rb
@@ -3,6 +3,9 @@
 ENV['FACTORY_BOT_RAILS'] = 'false'
 require 'spec_helper'
 
+# rubocop:disable RSpec/SpecFilePathFormat because we have to split the spec
+#   into multiple files to stub the availability of the +factory_bot_rails+ gem
+#   properly
 RSpec.describe FactoryBot::Instrumentation::Engine do
   context 'without factory_bot_rails' do
     it 'does not raise' do
@@ -10,3 +13,4 @@
     end
   end
 end
+# rubocop:enable RSpec/SpecFilePathFormat
diff --git a/spec/factory_bot_instrumentation_spec.rb b/spec/factory_bot/instrumentation_spec.rb
similarity index 100%
rename from spec/factory_bot_instrumentation_spec.rb
rename to spec/factory_bot/instrumentation_spec.rb