diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cad8695c..fd7aa6cd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
   build:
     strategy:
       matrix:
-        ruby: [ 'jruby-9.3', 'jruby-9.4', '2.6', '3.4' ]
+        ruby: [ 'jruby', '2.7', '3.4' ]
         python: [ '3.8', '3.13' ]
         platform: [ubuntu-latest, windows-latest, macos-latest]
     runs-on: ${{ matrix.platform }}
diff --git a/.rubocop.yml b/.rubocop.yml
index 7c8312c7..2917dc94 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,6 +1,5 @@
 AllCops:
-  NewCops: enable
-  TargetRubyVersion: 2.6
+  NewCops: disable
 Gemspec/RequireMFA:
   Enabled: false
 Metrics/AbcSize:
diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index 1dbe1c32..8c3eb709 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -5,10 +5,15 @@
 This document provides a high-level view of the changes to the {project-name} by release.
 For a detailed view of what has changed, refer to the {uri-repo}/commits/master[commit history] on GitHub.
 
+== Unreleased
+
+* Drop support for Ruby 2.6.
+The oldest supported is 2.7 now.
+
 == 3.0.0 (2024-05-14) - @slonopotamus
 
 * Drop support for Ruby 2.5.
-The oldest supported is 3.6 now.
+The oldest supported is 2.6 now.
 * Drop support for Python 3.6 and 3.7.
 The oldest supported is 3.8 now.
 * Update Pygments to 2.18.0
diff --git a/pygments.rb.gemspec b/pygments.rb.gemspec
index 159d4cf2..53aa177a 100644
--- a/pygments.rb.gemspec
+++ b/pygments.rb.gemspec
@@ -22,10 +22,10 @@ Gem::Specification.new do |s|
     'source_code_uri' => s.homepage
   }
 
-  s.required_ruby_version = '>= 2.6.0'
+  s.required_ruby_version = '>= 2.7.0'
 
   s.add_development_dependency 'rake', '~> 13.3.0'
-  s.add_development_dependency 'rubocop', '~> 1.50.2'
+  s.add_development_dependency 'rubocop', '~> 1.70.0'
   s.add_development_dependency 'test-unit', '~> 3.6.0'
 
   s.files = `git ls-files -z`.split("\0").reject { |f| File.symlink?(f) }