diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 7005d2d..beb7d83 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -1,20 +1,27 @@
 name: Ruby
 
-on: [push]
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
 
-jobs:
-  build:
+permissions:
+  contents: read
 
+jobs:
+  tests:
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: [ "1.9.3", "2.0.0", 2.1, 2.3, 2.4, 2.5, 2.6, 2.7, "3.0", 3.1, 3.2, jruby-9.1, jruby-9.2, jruby-9.3, jruby-9.4, truffleruby-head ]
+    name: ${{ matrix.ruby }}
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Ruby 2.6
-      uses: actions/setup-ruby@v1
+    - uses: actions/checkout@v3
+    - uses: actions/setup-ruby@v1
       with:
-        ruby-version: 2.6.x
-    - name: Build and test with Rake
-      run: |
-        gem install bundler
-        bundle install --jobs 4 --retry 3
-        bundle exec rake
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true
+    - run: bundle exec rake
diff --git a/.gitignore b/.gitignore
index b04a8c8..cbe6612 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@
 
 # rspec failure tracking
 .rspec_status
+Gemfile.lock
diff --git a/Gemfile b/Gemfile
index 189b312..5f10ba8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,12 +1,4 @@
 # frozen_string_literal: true
 
 source 'https://rubygems.org'
-
-# Specify your gem's dependencies in uuid_v6.gemspec
 gemspec
-
-gem 'rake'
-
-group :test do
-  gem 'rspec'
-end
diff --git a/Gemfile.lock b/Gemfile.lock
deleted file mode 100644
index 96acada..0000000
--- a/Gemfile.lock
+++ /dev/null
@@ -1,40 +0,0 @@
-PATH
-  remote: .
-  specs:
-    uuid_v6 (0.1.0)
-      uuid
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    diff-lcs (1.3)
-    macaddr (1.7.2)
-      systemu (~> 2.6.5)
-    rake (12.3.3)
-    rspec (3.8.0)
-      rspec-core (~> 3.8.0)
-      rspec-expectations (~> 3.8.0)
-      rspec-mocks (~> 3.8.0)
-    rspec-core (3.8.2)
-      rspec-support (~> 3.8.0)
-    rspec-expectations (3.8.4)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-mocks (3.8.1)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-support (3.8.2)
-    systemu (2.6.5)
-    uuid (2.3.9)
-      macaddr (~> 1.0)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  rake
-  rspec
-  uuid_v6!
-
-BUNDLED WITH
-   2.0.2
diff --git a/uuid_v6.gemspec b/uuid_v6.gemspec
index 5ead747..edeef4f 100644
--- a/uuid_v6.gemspec
+++ b/uuid_v6.gemspec
@@ -16,4 +16,5 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency 'uuid'
+  spec.add_development_dependency 'rspec'
 end