diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c69dcf2..a498321 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,7 +6,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest]
-        ruby: ['2.5', '2.6']
+        ruby: ['2.6']
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v3
diff --git a/.gitignore b/.gitignore
index 41e355c..0033b59 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,7 +28,6 @@ build/
 # for a library or gem, you might want to ignore these files since the code is
 # intended to run in multiple environments; otherwise, check them in:
 Gemfile.lock
-.ruby-version
 .ruby-gemset
 
 # unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
diff --git a/.rubocop.yml b/.rubocop.yml
index ba26709..8444f3c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,5 +1,8 @@
 require: rubocop-rspec
 
+AllCops:
+  TargetRubyVersion: 2.6
+
 Metrics/LineLength:
   Max: 100
 
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..a04abec
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+2.6.10
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fca796b..b476840 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- update the required ruby version from v2.2 to v2.6
 
 ## [0.0.3] - 2022-01-24
 ### Added
diff --git a/rspec-tabular.gemspec b/rspec-tabular.gemspec
index 6180f1a..b89b5af 100644
--- a/rspec-tabular.gemspec
+++ b/rspec-tabular.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.5.0'
+  spec.required_ruby_version = '>= 2.6.0'
 
   spec.add_runtime_dependency     'rspec-core', '>= 2.99.0'