diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dab8227..1ac5b29 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        gemfile: ['6.1_stable', '7.0_stable', '7.1_stable', '7.2_stable']
+        gemfile: ['7.0_stable', '7.1_stable', '7.2_stable']
         ruby-version: ['3.1', '3.2', '3.3']
     services:
       mysql:
diff --git a/Appraisals b/Appraisals
index 85f8d61..37ac6ff 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,10 +1,5 @@
 # frozen_string_literal: true
 
-appraise '6.1-stable' do
-  gem 'activerecord', '~> 6.1.0'
-  gem 'sqlite3', '~> 1.7.0'
-end
-
 appraise '7.0-stable' do
   gem 'activerecord', '~> 7.0.0'
   gem 'sqlite3', '~> 1.7.0'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b3c089..38b763f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,10 @@
+## Unreleased
+
+- Drop Rails 6.1 support #36
+
 ## 1.0.0
 
-- EOL Ruby and Rails no longer supported #29
-  - Requires Ruby 3.0.0 or newer.
-  - Requires Rails 6.1.0 or newer.
+- EOL Ruby and Rails no longer supported #29 #30
 - Support rails 7.0.0 #25
 - Support rails 7.1.0 #31
 - Migrate CI from travis.ci to GitHub Action. #27
diff --git a/README.md b/README.md
index 0f3c4ac..315f580 100644
--- a/README.md
+++ b/README.md
@@ -117,9 +117,9 @@ end
 ### Run spec
 
 ```bash
+docker compose up -d
 bundle exec appraisal install
-bundle exec appraisal 6.1-stable rspec
-bundle exec appraisal 7.0-stable rspec
+bundle exec appraisal rspec
 ```
 
 ## Contributing
diff --git a/active_record_encryption.gemspec b/active_record_encryption.gemspec
index 58cd7df..04acbf4 100644
--- a/active_record_encryption.gemspec
+++ b/active_record_encryption.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
     LICENSE.txt
   ] + Dir['lib/**/*.rb']
 
-  spec.add_dependency 'activerecord', '>= 6.1'
+  spec.add_dependency 'activerecord', '>= 7.0'
 
   spec.add_development_dependency 'appraisal'
   spec.add_development_dependency 'guard-rspec'
diff --git a/gemfiles/6.1_stable.gemfile b/gemfiles/6.1_stable.gemfile
deleted file mode 100644
index 9f0d5e3..0000000
--- a/gemfiles/6.1_stable.gemfile
+++ /dev/null
@@ -1,8 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "activerecord", "~> 6.1.0"
-gem "sqlite3", "~> 1.7.0"
-
-gemspec path: "../"