diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index 698cbe9b..ba865f76 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -13,10 +13,10 @@ jobs:
       fail-fast: false
       matrix:
         os: [windows-2019, ubuntu-latest]
-        ruby: ['2.5', '2.6', '2.7', '3.0', '3.1']
+        ruby: ['2.7', '3.0', '3.1']
     runs-on: ${{ matrix.os }}
     env:
-      BUNDLE_WITHOUT: profiling,debug,docs
+      BUNDLE_WITHOUT: profiling debug docs
     name: Unit test on ${{ matrix.os }} with Ruby ${{ matrix.ruby }}
     steps:
       - uses: actions/checkout@v2
diff --git a/cookstyle.gemspec b/cookstyle.gemspec
index 50b78217..c53a1f9d 100644
--- a/cookstyle.gemspec
+++ b/cookstyle.gemspec
@@ -11,7 +11,7 @@ Gem::Specification.new do |spec|
   spec.summary       = 'Cookstyle is a code linting tool that helps you to write better Chef Infra cookbooks by detecting and automatically correcting style, syntax, and logic mistakes in your code.'
   spec.license       = 'Apache-2.0'
   spec.homepage      = 'https://docs.chef.io/workstation/cookstyle/'
-  spec.required_ruby_version = '>= 2.5'
+  spec.required_ruby_version = '>= 2.7'
 
   # the gemspec and Gemfile are necessary for appbundling of the gem
   spec.files = %w(LICENSE cookstyle.gemspec Gemfile) + Dir.glob('{lib,bin,config}/**/*')