diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 40e0bb3..b774f46 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -12,7 +12,6 @@ jobs:
       matrix:
         ruby: ["3.0", "3.1", "3.2", "3.3"]
         gemfile: [
-          dev/gemfiles/rails-6.1.x.gemfile,
           dev/gemfiles/rails-7.0.x.gemfile,
           dev/gemfiles/rails-7.1.x.gemfile,
           Gemfile
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a9c3d25..826057c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+### Fixed
+
+* Drop support for Rails < 7.0 (TODO: add PR number)
+
 ## Version 2.3.0 (2024-08-23)
 
 ### Fixed
diff --git a/Gemfile.lock b/Gemfile.lock
index 053edf2..8fd5b22 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     cocooned (2.3.0)
-      rails (>= 6.1, <= 8.0)
+      rails (>= 7.0, <= 8.0)
 
 GEM
   remote: https://rubygems.org/
diff --git a/README.md b/README.md
index eb9d193..17b1a70 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 
 Cocooned makes it easier to handle nested forms in Rails.
 
-Cocooned is form builder-agnostic: it works with standard Rails (>= 6.1, < 8.0) form helpers, [Formtastic](https://github.com/justinfrench/formtastic) or [SimpleForm](https://github.com/plataformatec/simple_form).
+Cocooned is form builder-agnostic: it works with standard Rails (>= 7.0, < 8.0) form helpers, [Formtastic](https://github.com/justinfrench/formtastic) or [SimpleForm](https://github.com/plataformatec/simple_form).
 
 1. [Background](#some-background)
 2. [Installation](#installation)
diff --git a/cocooned.gemspec b/cocooned.gemspec
index 78faf60..36422db 100644
--- a/cocooned.gemspec
+++ b/cocooned.gemspec
@@ -38,9 +38,9 @@ Gem::Specification.new do |spec|
   spec.files = `git ls-files -z`.split("\x0").reject do |f|
     f.match(excluded_dirs) || excluded_files.include?(f)
   end
-  spec.required_ruby_version = '>= 2.6'
+  spec.required_ruby_version = '>= 2.7'
 
-  spec.add_dependency 'rails', '>= 6.1', '<= 8.0'
+  spec.add_dependency 'rails', '>= 7.0', '<= 8.0'
 
   spec.add_development_dependency 'bundler', '~> 2.1'
   spec.add_development_dependency 'rake', '~> 13.0'
diff --git a/dev/gemfiles/rails-6.1.x.gemfile b/dev/gemfiles/rails-6.1.x.gemfile
deleted file mode 100644
index 0e3c50f..0000000
--- a/dev/gemfiles/rails-6.1.x.gemfile
+++ /dev/null
@@ -1,19 +0,0 @@
-# frozen_string_literal: true
-
-source 'http://rubygems.org'
-
-gemspec path: '../..'
-
-group :development, :test do
-  gem 'psych', '< 4.0.0'
-  gem 'puma'
-  gem 'rails', '~> 6.1.0'
-  gem 'shakapacker', '~> 7.1.0'
-  gem 'sqlite3', '~> 1.4'
-
-  gem 'formtastic', '~> 5.0'
-  gem 'nokogiri'
-  gem 'rspec-rails', '~> 6.0'
-  gem 'simplecov', require: false
-  gem 'simple_form', '~> 5.1'
-end
diff --git a/dev/rubocop.yml b/dev/rubocop.yml
index 96f3f21..8d02424 100644
--- a/dev/rubocop.yml
+++ b/dev/rubocop.yml
@@ -7,7 +7,7 @@ require:
 
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 2.6
+  TargetRubyVersion: 2.7
 
 Naming/FileName:
   Exclude:
diff --git a/npm/README.md b/npm/README.md
index d6baecc..83ddb8a 100644
--- a/npm/README.md
+++ b/npm/README.md
@@ -4,7 +4,7 @@ This is a companion package for the [cocooned Ruby gem](https://rubygems.org/gem
 
 Cocooned makes it easier to handle nested forms in Rails.
 
-Cocooned is form builder-agnostic: it works with standard Rails (>= 6.1, < 8.0) form helpers, [Formtastic](https://github.com/justinfrench/formtastic) or [SimpleForm](https://github.com/plataformatec/simple_form).
+Cocooned is form builder-agnostic: it works with standard Rails (>= 7.0, < 8.0) form helpers, [Formtastic](https://github.com/justinfrench/formtastic) or [SimpleForm](https://github.com/plataformatec/simple_form).
 
 1. [Installation](#installation)
 2. [Import](#import), default, custom or with [jQuery integration](#jquery-integration)
diff --git a/spec/dummy/config/application.rb b/spec/dummy/config/application.rb
index 647f415..4e89ba4 100644
--- a/spec/dummy/config/application.rb
+++ b/spec/dummy/config/application.rb
@@ -14,7 +14,7 @@
 module Dummy
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 6.1
+    config.load_defaults 7.0
     config.active_support.cache_format_version = 7.0
 
     # Configuration for the application, engines, and railties goes here.