diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7b908a3..8af5fb9 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -14,22 +14,18 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - ruby: 2.7.3
-            gemfile: Gemfile.6-1
-          - ruby: 2.7.3
-            gemfile: Gemfile.7-1
           - ruby: 3.2.0
-            gemfile: Gemfile.6-1
-          - ruby: 3.2.0
-            gemfile: Gemfile.7-1
+            gemfile: Gemfile.7-2
           - ruby: 3.2.0
             gemfile: Gemfile.8-0
-          - ruby: 3.4.1
-            gemfile: Gemfile.7-1
           - ruby: 3.4.1
             gemfile: Gemfile.7-2
           - ruby: 3.4.1
             gemfile: Gemfile.8-0
+          - ruby: 4.0.1
+            gemfile: Gemfile.8-0
+          - ruby: 4.0.1
+            gemfile: Gemfile.8-1
     env:
       BUNDLE_GEMFILE: "${{ matrix.gemfile }}"
     steps:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a9af5d..2438168 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,7 +13,13 @@ This project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html
 
 -
 
+## 2.0.1 - 2026-03-10
 
+### Compatible changes
+
+- Add tests for Ruby 4.0 and Rails 8.1
+- Introduce `required_ruby_version` in gemspec so people on legacy Ruby versions don't receive future upgrades
+- Drop tests and support for Ruby < 3 and Rails < 7.2
 
 ## 2.0.0 - 2025-01-22
 
diff --git a/Gemfile.6-1.lock b/Gemfile.6-1.lock
deleted file mode 100644
index eec6c4b..0000000
--- a/Gemfile.6-1.lock
+++ /dev/null
@@ -1,127 +0,0 @@
-PATH
-  remote: .
-  specs:
-    consul (2.0.0)
-      activerecord (>= 6.0)
-      activesupport (>= 6.0)
-      edge_rider (>= 0.3.0)
-      memoized (>= 1.0.2)
-      railties (>= 6.0)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    actionpack (6.1.3)
-      actionview (= 6.1.3)
-      activesupport (= 6.1.3)
-      rack (~> 2.0, >= 2.0.9)
-      rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actionview (6.1.3)
-      activesupport (= 6.1.3)
-      builder (~> 3.1)
-      erubi (~> 1.4)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.1, >= 1.2.0)
-    activemodel (6.1.3)
-      activesupport (= 6.1.3)
-    activerecord (6.1.3)
-      activemodel (= 6.1.3)
-      activesupport (= 6.1.3)
-    activesupport (6.1.3)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 1.6, < 2)
-      minitest (>= 5.1)
-      tzinfo (~> 2.0)
-      zeitwerk (~> 2.3)
-    assignable_values (0.18.0)
-      activerecord (>= 2.3)
-    builder (3.2.4)
-    concurrent-ruby (1.2.0)
-    crass (1.0.6)
-    database_cleaner (1.7.0)
-    diff-lcs (1.3)
-    edge_rider (2.1.1)
-      activerecord (>= 3.2)
-    erubi (1.10.0)
-    gemika (0.8.1)
-    i18n (1.12.0)
-      concurrent-ruby (~> 1.0)
-    loofah (2.9.0)
-      crass (~> 1.0.2)
-      nokogiri (>= 1.5.9)
-    memoized (1.1.1)
-    method_source (1.1.0)
-    mini_portile2 (2.8.8)
-    minitest (5.15.0)
-    nokogiri (1.15.0)
-      mini_portile2 (~> 2.8.2)
-      racc (~> 1.4)
-    racc (1.8.1)
-    rack (2.2.3)
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
-    rails-dom-testing (2.0.3)
-      activesupport (>= 4.2.0)
-      nokogiri (>= 1.6)
-    rails-html-sanitizer (1.3.0)
-      loofah (~> 2.3)
-    railties (6.1.3)
-      actionpack (= 6.1.3)
-      activesupport (= 6.1.3)
-      method_source
-      rake (>= 0.8.7)
-      thor (~> 1.0)
-    rake (13.2.1)
-    rspec (3.6.0)
-      rspec-core (~> 3.6.0)
-      rspec-expectations (~> 3.6.0)
-      rspec-mocks (~> 3.6.0)
-    rspec-core (3.6.0)
-      rspec-support (~> 3.6.0)
-    rspec-expectations (3.6.0)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-mocks (3.6.0)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-rails (3.6.0)
-      actionpack (>= 3.0)
-      activesupport (>= 3.0)
-      railties (>= 3.0)
-      rspec-core (~> 3.6.0)
-      rspec-expectations (~> 3.6.0)
-      rspec-mocks (~> 3.6.0)
-      rspec-support (~> 3.6.0)
-    rspec-support (3.6.0)
-    rspec_candy (0.4.1)
-      rspec
-      sneaky-save
-    shoulda-matchers (3.1.1)
-      activesupport (>= 4.0.0)
-    sneaky-save (0.1.2)
-      activerecord (>= 3.2.0)
-    sqlite3 (1.4.2)
-    thor (1.3.2)
-    tzinfo (2.0.5)
-      concurrent-ruby (~> 1.0)
-    zeitwerk (2.6.6)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  assignable_values
-  consul!
-  database_cleaner
-  gemika (>= 0.8.1)
-  railties (~> 6.1)
-  rspec
-  rspec-rails
-  rspec_candy
-  shoulda-matchers
-  sqlite3
-
-BUNDLED WITH
-   2.3.1
diff --git a/Gemfile.7-1 b/Gemfile.7-1
deleted file mode 100644
index 653db94..0000000
--- a/Gemfile.7-1
+++ /dev/null
@@ -1,17 +0,0 @@
-source 'https://rubygems.org'
-
-# Runtime dependencies
-gem 'railties', '~> 7.1'
-gem 'assignable_values'
-
-# Development dependencies
-gem 'rspec'
-gem 'rspec-rails'
-gem 'rspec_candy'
-gem 'shoulda-matchers'
-gem 'sqlite3', "~> 1.7"
-gem 'database_cleaner'
-gem 'gemika', '>= 0.8.1'
-
-# Gem under test
-gem 'consul', :path => '.'
diff --git a/Gemfile.7-2 b/Gemfile.7-2
index aad267c..80bf34e 100644
--- a/Gemfile.7-2
+++ b/Gemfile.7-2
@@ -11,7 +11,7 @@ gem 'rspec_candy'
 gem 'shoulda-matchers'
 gem 'sqlite3', "~> 1.7"
 gem 'database_cleaner'
-gem 'gemika', '>= 0.8.1'
+gem 'gemika', '>= 2.0.0'
 
 # Gem under test
 gem 'consul', :path => '.'
diff --git a/Gemfile.7-2.lock b/Gemfile.7-2.lock
index 9c70527..1a94789 100644
--- a/Gemfile.7-2.lock
+++ b/Gemfile.7-2.lock
@@ -1,12 +1,12 @@
 PATH
   remote: .
   specs:
-    consul (2.0.0)
-      activerecord (>= 6.0)
-      activesupport (>= 6.0)
+    consul (2.0.1)
+      activerecord (>= 7.2)
+      activesupport (>= 7.2)
       edge_rider (>= 0.3.0)
       memoized (>= 1.0.2)
-      railties (>= 6.0)
+      railties (>= 7.2)
 
 GEM
   remote: https://rubygems.org/
@@ -66,7 +66,7 @@ GEM
     edge_rider (2.3.0)
       activerecord (>= 3.2)
     erubi (1.13.0)
-    gemika (0.8.3)
+    gemika (2.0.0)
     i18n (1.14.5)
       concurrent-ruby (~> 1.0)
     io-console (0.7.2)
@@ -159,7 +159,7 @@ DEPENDENCIES
   assignable_values
   consul!
   database_cleaner
-  gemika (>= 0.8.1)
+  gemika (>= 2.0.0)
   railties (~> 7.2)
   rspec
   rspec-rails
diff --git a/Gemfile.8-0 b/Gemfile.8-0
index a5c84df..e794e3d 100644
--- a/Gemfile.8-0
+++ b/Gemfile.8-0
@@ -11,7 +11,11 @@ gem 'rspec_candy'
 gem 'shoulda-matchers'
 gem 'sqlite3'
 gem 'database_cleaner'
-gem 'gemika', '>= 0.8.1'
+gem 'gemika', '>= 2.0.0'
+gem 'actionpack'
+
+# Previous default gems
+gem 'cgi'
 
 # Gem under test
 gem 'consul', :path => '.'
diff --git a/Gemfile.8-0.lock b/Gemfile.8-0.lock
index d244d35..9bf4626 100644
--- a/Gemfile.8-0.lock
+++ b/Gemfile.8-0.lock
@@ -1,12 +1,12 @@
 PATH
   remote: .
   specs:
-    consul (2.0.0)
-      activerecord (>= 6.0)
-      activesupport (>= 6.0)
+    consul (2.0.1)
+      activerecord (>= 7.2)
+      activesupport (>= 7.2)
       edge_rider (>= 0.3.0)
       memoized (>= 1.0.2)
-      railties (>= 6.0)
+      railties (>= 7.2)
 
 GEM
   remote: https://rubygems.org/
@@ -52,6 +52,7 @@ GEM
     benchmark (0.4.0)
     bigdecimal (3.1.8)
     builder (3.3.0)
+    cgi (0.3.6)
     concurrent-ruby (1.3.3)
     connection_pool (2.4.1)
     crass (1.0.6)
@@ -67,7 +68,7 @@ GEM
     edge_rider (2.3.0)
       activerecord (>= 3.2)
     erubi (1.13.0)
-    gemika (0.8.3)
+    gemika (2.0.0)
     i18n (1.14.5)
       concurrent-ruby (~> 1.0)
     io-console (0.8.0)
@@ -80,10 +81,12 @@ GEM
       nokogiri (>= 1.12.0)
     memoized (1.1.1)
     mini_portile2 (2.8.8)
-    minitest (5.24.1)
+    minitest (6.0.1)
+      prism (~> 1.5)
     nokogiri (1.16.6)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
+    prism (1.9.0)
     psych (5.2.2)
       date
       stringio
@@ -159,10 +162,12 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  actionpack
   assignable_values
+  cgi
   consul!
   database_cleaner
-  gemika (>= 0.8.1)
+  gemika (>= 2.0.0)
   railties (~> 8.0)
   rspec
   rspec-rails
diff --git a/Gemfile.6-1 b/Gemfile.8-1
similarity index 71%
rename from Gemfile.6-1
rename to Gemfile.8-1
index 6cb5829..4b1c61b 100644
--- a/Gemfile.6-1
+++ b/Gemfile.8-1
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 # Runtime dependencies
-gem 'railties', '~> 6.1'
+gem 'railties', '~> 8.1'
 gem 'assignable_values'
 
 # Development dependencies
@@ -11,7 +11,11 @@ gem 'rspec_candy'
 gem 'shoulda-matchers'
 gem 'sqlite3'
 gem 'database_cleaner'
-gem 'gemika', '>= 0.8.1'
+gem 'gemika', '>= 2.0.0'
+gem 'actionpack'
+
+# Previous default gems
+gem 'cgi'
 
 # Gem under test
 gem 'consul', :path => '.'
diff --git a/Gemfile.7-1.lock b/Gemfile.8-1.lock
similarity index 64%
rename from Gemfile.7-1.lock
rename to Gemfile.8-1.lock
index 824ae35..2452157 100644
--- a/Gemfile.7-1.lock
+++ b/Gemfile.8-1.lock
@@ -1,53 +1,57 @@
 PATH
   remote: .
   specs:
-    consul (2.0.0)
-      activerecord (>= 6.0)
-      activesupport (>= 6.0)
+    consul (2.0.1)
+      activerecord (>= 7.2)
+      activesupport (>= 7.2)
       edge_rider (>= 0.3.0)
       memoized (>= 1.0.2)
-      railties (>= 6.0)
+      railties (>= 7.2)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    actionpack (7.1.4.2)
-      actionview (= 7.1.4.2)
-      activesupport (= 7.1.4.2)
+    actionpack (8.1.2)
+      actionview (= 8.1.2)
+      activesupport (= 8.1.2)
       nokogiri (>= 1.8.5)
-      racc
       rack (>= 2.2.4)
       rack-session (>= 1.0.1)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    actionview (7.1.4.2)
-      activesupport (= 7.1.4.2)
+      useragent (~> 0.16)
+    actionview (8.1.2)
+      activesupport (= 8.1.2)
       builder (~> 3.1)
       erubi (~> 1.11)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    activemodel (7.1.4.2)
-      activesupport (= 7.1.4.2)
-    activerecord (7.1.4.2)
-      activemodel (= 7.1.4.2)
-      activesupport (= 7.1.4.2)
+    activemodel (8.1.2)
+      activesupport (= 8.1.2)
+    activerecord (8.1.2)
+      activemodel (= 8.1.2)
+      activesupport (= 8.1.2)
       timeout (>= 0.4.0)
-    activesupport (7.1.4.2)
+    activesupport (8.1.2)
       base64
       bigdecimal
-      concurrent-ruby (~> 1.0, >= 1.0.2)
+      concurrent-ruby (~> 1.0, >= 1.3.1)
       connection_pool (>= 2.2.5)
       drb
       i18n (>= 1.6, < 2)
+      json
+      logger (>= 1.4.2)
       minitest (>= 5.1)
-      mutex_m
-      tzinfo (~> 2.0)
-    assignable_values (1.1.1)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
+    assignable_values (1.0.0)
       activerecord (>= 2.3)
     base64 (0.2.0)
     bigdecimal (3.1.8)
     builder (3.3.0)
+    cgi (0.3.6)
     concurrent-ruby (1.3.3)
     connection_pool (2.4.1)
     crass (1.0.6)
@@ -57,34 +61,39 @@ GEM
       activerecord (>= 5.a)
       database_cleaner-core (~> 2.0.0)
     database_cleaner-core (2.0.1)
-    date (3.4.1)
+    date (3.5.1)
     diff-lcs (1.5.1)
     drb (2.2.1)
     edge_rider (2.3.0)
       activerecord (>= 3.2)
+    erb (6.0.1)
     erubi (1.13.0)
-    gemika (0.8.3)
+    gemika (2.0.0)
     i18n (1.14.5)
       concurrent-ruby (~> 1.0)
-    io-console (0.8.0)
-    irb (1.15.1)
+    io-console (0.8.2)
+    irb (1.17.0)
       pp (>= 0.6.0)
+      prism (>= 1.3.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
+    json (2.18.1)
+    logger (1.6.1)
     loofah (2.22.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     memoized (1.1.1)
-    mini_portile2 (2.8.7)
-    minitest (5.24.1)
-    mutex_m (0.3.0)
-    nokogiri (1.15.6)
+    mini_portile2 (2.8.8)
+    minitest (6.0.1)
+      prism (~> 1.5)
+    nokogiri (1.16.6)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    pp (0.6.2)
+    pp (0.6.3)
       prettyprint
     prettyprint (0.2.0)
-    psych (5.2.3)
+    prism (1.9.0)
+    psych (5.3.1)
       date
       stringio
     racc (1.8.0)
@@ -93,7 +102,7 @@ GEM
       rack (>= 3.0.0)
     rack-test (2.1.0)
       rack (>= 1.3)
-    rackup (2.2.1)
+    rackup (2.3.1)
       rack (>= 3)
     rails-dom-testing (2.2.0)
       activesupport (>= 5.0.0)
@@ -102,18 +111,21 @@ GEM
     rails-html-sanitizer (1.6.0)
       loofah (~> 2.21)
       nokogiri (~> 1.14)
-    railties (7.1.4.2)
-      actionpack (= 7.1.4.2)
-      activesupport (= 7.1.4.2)
-      irb
+    railties (8.1.2)
+      actionpack (= 8.1.2)
+      activesupport (= 8.1.2)
+      irb (~> 1.13)
       rackup (>= 1.0.0)
       rake (>= 12.2)
       thor (~> 1.0, >= 1.2.2)
+      tsort (>= 0.2)
       zeitwerk (~> 2.6)
-    rake (13.2.1)
-    rdoc (6.11.0)
+    rake (13.3.1)
+    rdoc (7.2.0)
+      erb
       psych (>= 4.0.0)
-    reline (0.6.0)
+      tsort
+    reline (0.6.3)
       io-console (~> 0.5)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)
@@ -127,10 +139,10 @@ GEM
     rspec-mocks (3.13.1)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
-    rspec-rails (7.1.0)
-      actionpack (>= 7.0)
-      activesupport (>= 7.0)
-      railties (>= 7.0)
+    rspec-rails (6.1.3)
+      actionpack (>= 6.1)
+      activesupport (>= 6.1)
+      railties (>= 6.1)
       rspec-core (~> 3.13)
       rspec-expectations (~> 3.13)
       rspec-mocks (~> 3.13)
@@ -139,33 +151,39 @@ GEM
     rspec_candy (0.5.1)
       rspec
       sneaky-save
-    shoulda-matchers (5.3.0)
+    securerandom (0.3.2)
+    shoulda-matchers (6.2.0)
       activesupport (>= 5.2.0)
     sneaky-save (0.1.3)
       activerecord (>= 3.2.0)
-    sqlite3 (1.7.3)
+    sqlite3 (2.4.1)
       mini_portile2 (~> 2.8.0)
-    stringio (3.1.2)
-    thor (1.3.2)
+    stringio (3.2.0)
+    thor (1.5.0)
     timeout (0.4.1)
+    tsort (0.2.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    zeitwerk (2.6.18)
+    uri (1.0.2)
+    useragent (0.16.10)
+    zeitwerk (2.7.4)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  actionpack
   assignable_values
+  cgi
   consul!
   database_cleaner
-  gemika (>= 0.8.1)
-  railties (~> 7.1)
+  gemika (>= 2.0.0)
+  railties (~> 8.1)
   rspec
   rspec-rails
   rspec_candy
   shoulda-matchers
-  sqlite3 (~> 1.7)
+  sqlite3
 
 BUNDLED WITH
-   2.4.22
+   2.5.15
diff --git a/README.md b/README.md
index 2230d1f..3de9e9e 100644
--- a/README.md
+++ b/README.md
@@ -834,16 +834,39 @@ Now run `bundle install` to lock the gem into your project.
 
 ## Development
 
-We currently develop using Ruby 3.4.1 (see `.ruby-version`) since that version works for current versions of ActiveRecord that we support. GitHub Actions will test additional Ruby versions (2.7.3, 3.2.0).
+We currently develop using Ruby 3.4.1 (see `.ruby-version`) since that version works for current versions of ActiveRecord that we support. GitHub Actions will test additional Ruby versions (3.2.0, 4.0.1).
 
 There are tests in `spec`. We only accept PRs with tests. To run tests:
 
-- Install Ruby 3.4.1
-- run `bundle install`
-- Put your database credentials into `spec/support/database.yml`. There's a `database.sample.yml` you can use as a template.
-- There are gem bundles in the project root for each rails version that we support.
-- You can bundle all test applications by saying `bundle exec rake matrix:install`
-- You can run specs from the project root by saying `bundle exec rake matrix:spec`. This will run all gemfiles compatible with your current Ruby.
+- First, put your database credentials into `spec/support/database.yml`. There's a `database.sample.yml` you can use as
+  a template.
+
+Then, you have multiple options:
+
+1. Running tests for a single set of dependencies
+   - Install and switch to a Ruby version
+   - run `BUNDLE_GEMFILE=... bundle install`
+   - run `BUNDLE_GEMFILE=... bundle exec rspec`
+   - NOTE:
+     - There are gem bundles in the project root for each rails version that we support.
+     - Refer to `.github/workflows/test.yml` to see which Gemfiles are supported for which Ruby version.
+
+2. Run tests against a specific Ruby version and all Gemfiles for that version:
+   - Install and switch to the Ruby version
+   - Install development dependencies using `rake matrix:install`
+   - Run tests using `rake matrix:spec`
+
+3. Run tests against all Ruby versions:
+   - Install all Ruby versions mentioned in `.github/workflows/test.yml`
+   - run `dev/matrix` (only supports `rbenv` for switching Ruby versions currently)
+
+Hints:
+
+- Check the [gemika](github.com/makandra/gemika) README for more detailed development instructions.
+- We recommend to have sufficiently new versions of bundler (> 2.3.0) and rubygems (> 3.3.0) installed for each Ruby
+  version.
+- The script `dev/matrix` will warn you, if that is not the case. For all other methods you need to ensure that
+  yourself.
 
 If you would like to contribute:
 
diff --git a/consul.gemspec b/consul.gemspec
index 0a8e553..c8b2777 100644
--- a/consul.gemspec
+++ b/consul.gemspec
@@ -10,24 +10,24 @@ Gem::Specification.new do |s|
   s.summary = 'A scope-based authorization solution for Ruby on Rails.'
   s.description = s.summary
   s.license = 'MIT'
+  s.metadata = {
+    'source_code_uri' => s.homepage,
+    'bug_tracker_uri' => 'https://github.com/makandra/consul/issues',
+    'changelog_uri' => 'https://github.com/makandra/consul/blob/master/CHANGELOG.md',
+    'rubygems_mfa_required' => 'true',
+  }
 
-  if RUBY_VERSION.to_f >= 2.0
-    s.metadata = {
-      'source_code_uri' => s.homepage,
-      'bug_tracker_uri' => 'https://github.com/makandra/consul/issues',
-      'changelog_uri' => 'https://github.com/makandra/consul/blob/master/CHANGELOG.md',
-      'rubygems_mfa_required' => 'true',
-    }
-  end
-
-  s.files         = `git ls-files`.split("\n").reject { |f| f.match(%r{^(test|spec|features)/}) }
-  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
-  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
+  s.files = `git ls-files`.split("\n").reject { |f| File.symlink?(f) }.reject { |f| f.match(%r{^(spec|dev|media|.github)/}) }
   s.require_paths = ["lib"]
 
+  s.bindir = 'exe'
+  s.executables = []
+
+  s.required_ruby_version = '>= 3.0.0'
+
   s.add_dependency('memoized', '>=1.0.2')
-  s.add_dependency('activerecord', '>= 6.0')
-  s.add_dependency('activesupport', '>= 6.0')
-  s.add_dependency('railties', '>= 6.0')
+  s.add_dependency('activerecord', '>= 7.2')
+  s.add_dependency('activesupport', '>= 7.2')
+  s.add_dependency('railties', '>= 7.2')
   s.add_dependency('edge_rider', '>= 0.3.0')
 end
diff --git a/dev/matrix b/dev/matrix
new file mode 100755
index 0000000..38498a8
--- /dev/null
+++ b/dev/matrix
@@ -0,0 +1,65 @@
+#!/bin/bash
+set -euo pipefail
+
+# utility for comparing version strings
+# https://stackoverflow.com/questions/4023830/how-to-compare-two-strings-in-dot-separated-version-format-in-bash
+function version { echo "$@" | awk -F. '{ printf("%d%03d%03d%03d\n", $1,$2,$3,$4); }'; }
+
+# store current Ruby version and restore it on exit
+original_ruby_version=$(cat .ruby-version)
+trap "rbenv local $original_ruby_version" EXIT
+
+# determine employed Ruby versions (awk command == "strip whitespace", sed command == "delete_prefix")
+readarray -t versions < <(grep ruby: .github/workflows/test.yml | awk '{$1=$1};1' | sed 's/- ruby: //' | sort | uniq)
+echo "Detected Ruby versions:"
+for version in "${versions[@]}"
+do
+  echo "- $version"
+done
+echo ""
+
+for version in "${versions[@]}"
+do
+  # switch Ruby version
+  rbenv local "$version"
+
+  # determine actual versions
+  ruby_version=$(ruby -v)
+  rubygems_version=$(gem -v)
+  bundler_version=$(bundler -v | sed 's/Bundler version //')
+
+  # debug output
+  echo "====================="
+  echo "Target Ruby version: $version"
+  echo ""
+  echo "Ruby: $ruby_version"
+  echo "rubygems: $rubygems_version"
+  echo "Bundler: $bundler_version"
+  echo "====================="
+  echo ""
+
+  # version checks (minimum versions to make 'BUNDLED WITH' in Gemfile.lock work correctly)
+  if [ $(version $rubygems_version) -lt $(version "3.3.0") ]; then
+    echo "Please ensure that your rubygems version is > 3.3.0 for Ruby $ruby_version!"
+    echo "Install newest version:"
+    echo "gem update --system"
+    echo "Install specific version:"
+    echo "gem update --system <version>"
+    exit 1
+  fi
+
+  if [ $(version $bundler_version) -lt $(version "2.3.0") ]; then
+    echo "Please ensure that your Bundler version is > 2.3.0 for Ruby $ruby_version!"
+    echo "Install newest version:"
+    echo "gem install bundler"
+    echo "Install specific version:"
+    echo "gem install bundler:<version>"
+    exit 1
+  fi
+
+  # bundle and run specs
+  rake matrix:install
+  rake matrix:spec
+done
+
+exit 0
diff --git a/lib/consul/version.rb b/lib/consul/version.rb
index 6c92a0e..8c9e984 100644
--- a/lib/consul/version.rb
+++ b/lib/consul/version.rb
@@ -1,3 +1,3 @@
 module Consul
-  VERSION = '2.0.0'
+  VERSION = '2.0.1'
 end