diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4e15e09..33437dc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,31 +19,11 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.5', '2.6', '2.7', '3.0', '3.1', '3.2']
-        gemfile: [ar_52, ar_60, ar_61, ar_70, ar_next]
-        exclude:
-          - ruby-version: '3.2'
-            gemfile: ar_52
-          - ruby-version: '3.2'
-            gemfile: ar_60
-          - ruby-version: '3.2'
-            gemfile: ar_61
-          - ruby-version: '3.1'
-            gemfile: ar_52
-          - ruby-version: '3.1'
-            gemfile: ar_60
-          - ruby-version: '3.1'
-            gemfile: ar_61
-          - ruby-version: '3.0'
-            gemfile: ar_52
-          - ruby-version: '2.6'
-            gemfile: ar_next
-          - ruby-version: '2.6'
-            gemfile: ar_70
-          - ruby-version: '2.5'
-            gemfile: ar_next
-          - ruby-version: '2.5'
-            gemfile: ar_70
+        ruby-version: ['3.1', '3.2', '3.3']
+        gemfile: [ar_70, ar_71, ar_72, ar_next]
+#        exclude:
+#          - ruby-version: '3.2'
+#            gemfile: ar_60
     env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
     steps:
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 57fce48..46ee2cc 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -18,14 +18,14 @@ jobs:
 
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Ruby
     # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
     # change this to (see https://github.com/ruby/setup-ruby#versioning):
       uses: ruby/setup-ruby@v1
     #  uses: ruby/setup-ruby@473e4d8fe5dd94ee328fdfca9f8c9c7afc9dae5e
       with:
-        ruby-version: 2.7
+        ruby-version: 3.1
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
     - name: Run rubocop
       run: bundle exec rubocop
diff --git a/.github/workflows/rubygem.yml b/.github/workflows/rubygem.yml
index 028db84..dd1c6fb 100644
--- a/.github/workflows/rubygem.yml
+++ b/.github/workflows/rubygem.yml
@@ -18,11 +18,11 @@ jobs:
       contents: read
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: 3.1
       - run: bundle install
       - name: Publish to RubyGems
         env:
diff --git a/.rubocop.yml b/.rubocop.yml
index b5b2d3a..0c85b0c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -5,10 +5,13 @@ require:
 inherit_from: .rubocop_todo.yml
 
 AllCops:
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 3.1
   NewCops: enable
   SuggestExtensions: false
 
+Gemspec/DevelopmentDependencies:
+  EnforcedStyle: gemspec
+
 Gemspec/RequireMFA:
   Enabled: false
 
@@ -24,6 +27,9 @@ RSpec/NestedGroups:
 Style/Alias:
   EnforcedStyle: prefer_alias
 
+Style/Documentation:
+  Enabled: false
+
 Style/FrozenStringLiteralComment:
   Exclude:
     - 'gemfiles/**/*'
diff --git a/Appraisals b/Appraisals
index d744c1e..22e834b 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,23 +1,18 @@
 # frozen_string_literal: true
 
-appraise 'ar-52' do
-  gem 'activerecord', '~> 5.2.0'
-  gem 'activesupport', '~> 5.2.0'
-end
-
-appraise 'ar-60' do
-  gem 'activerecord', '~> 6.0.0'
-  gem 'activesupport', '~> 6.0.0'
+appraise 'ar-70' do
+  gem 'activerecord', '~> 7.0'
+  gem 'activesupport', '~> 7.0'
 end
 
-appraise 'ar-61' do
-  gem 'activerecord', '~> 6.1.0'
-  gem 'activesupport', '~> 6.1.0'
+appraise 'ar-71' do
+  gem 'activerecord', '~> 7.1'
+  gem 'activesupport', '~> 7.1'
 end
 
-appraise 'ar-70' do
-  gem 'activerecord', '~> 7.0'
-  gem 'activesupport', '~> 7.0'
+appraise 'ar-72' do
+  gem 'activerecord', '~> 7.2'
+  gem 'activesupport', '~> 7.2'
 end
 
 appraise 'ar-next' do
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd326be..0322c00 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+### Version 4.0.0
+- ADD: Support for Rails 7.2 
+- BREAKING: Dropped support for Rails < 7
+- BREAKING: Dropped support old Rubies < 3.1 
+
 ### Version 3.5.0
 - Added :dependent option for setting explicit deletion behaviour (issue #31)
 - Added automatic cycle detection when supported (currently only PostgresSQL 14+) (issue #22)
diff --git a/README.md b/README.md
index 2b63ace..ea319ce 100644
--- a/README.md
+++ b/README.md
@@ -14,20 +14,16 @@ Luckily, there is already a SQL standard that makes it very easy to retrieve dat
 
 ## Supported environments
 ActsAsRecursiveTree currently supports following ActiveRecord versions and is tested for compatibility:
-  * ActiveRecord 5.2.x
-  * ActiveRecord 6.0.x
-  * ActiveRecord 6.1.x
   * ActiveRecord 7.0.x
   * ActiveRecord 7.1.x
+  * ActiveRecord 7.2.x
+  * ActiveRecord NEXT (from git)
 
 ## Supported Rubies
 ActsAsRecursiveTree is tested with following rubies:
-  * MRuby 2.5
-  * MRuby 2.6
-  * MRuby 2.7
-  * MRuby 3.0
   * MRuby 3.1
   * MRuby 3.2
+  * MRuby 3.3
 
 Other Ruby implementations are not tested, but should also work.
 
diff --git a/Rakefile b/Rakefile
index b7645a1..2aa5b35 100644
--- a/Rakefile
+++ b/Rakefile
@@ -10,6 +10,6 @@ task default: [:spec]
 desc 'Deletes temporary files'
 task :clean_tmp_files do
   %w[db.log test.sqlite3].each do |file|
-    File.delete(file) if File.exist?(file)
+    FileUtils.rm_f(file)
   end
 end
diff --git a/acts_as_recursive_tree.gemspec b/acts_as_recursive_tree.gemspec
index 29a1528..1ec6034 100644
--- a/acts_as_recursive_tree.gemspec
+++ b/acts_as_recursive_tree.gemspec
@@ -18,22 +18,21 @@ Gem::Specification.new do |spec|
     'bug_tracker_uri' => 'https://github.com/1and1/acts_as_recursive_tree/issues',
     'changelog_uri' => 'https://github.com/1and1/acts_as_recursive_tree/blob/main/CHANGELOG.md'
   }
-  spec.required_ruby_version = '>= 2.5.0'
+  spec.required_ruby_version = '>= 3.1.0'
   spec.files                 = `git ls-files -z`.split("\x0")
-  spec.test_files            = spec.files.grep(%r{^spec/})
   spec.require_paths         = ['lib']
 
-  spec.add_runtime_dependency 'activerecord', '>= 5.2.0', '< 8'
-  spec.add_runtime_dependency 'activesupport', '>= 5.2.0', '< 8'
-  spec.add_runtime_dependency 'zeitwerk', '>= 2.4'
+  spec.add_dependency 'activerecord', '>= 7.0.0', '< 8'
+  spec.add_dependency 'activesupport', '>= 7.0.0', '< 8'
+  spec.add_dependency 'zeitwerk', '>= 2.4'
 
-  spec.add_development_dependency 'appraisal', '~> 2.4'
-  spec.add_development_dependency 'database_cleaner-active_record', '~> 2.1'
+  spec.add_development_dependency 'appraisal', '~> 2.5'
+  spec.add_development_dependency 'database_cleaner-active_record', '~> 2.2'
   spec.add_development_dependency 'rake'
-  spec.add_development_dependency 'rspec-rails', '>= 3.5'
-  spec.add_development_dependency 'rubocop', '~> 1.23.0'
-  spec.add_development_dependency 'rubocop-rails', '~> 2.12.0'
-  spec.add_development_dependency 'rubocop-rspec', '~> 2.6.0'
+  spec.add_development_dependency 'rspec-rails', '>= 6.1'
+  spec.add_development_dependency 'rubocop', '~> 1.66.0'
+  spec.add_development_dependency 'rubocop-rails', '~> 2.26.0'
+  spec.add_development_dependency 'rubocop-rspec', '~> 3.0.4'
 
-  spec.add_development_dependency 'sqlite3', '~> 1.3'
+  spec.add_development_dependency 'sqlite3', '~> 2.0'
 end
diff --git a/gemfiles/ar_61.gemfile b/gemfiles/ar_61.gemfile
deleted file mode 100644
index 43affbe..0000000
--- a/gemfiles/ar_61.gemfile
+++ /dev/null
@@ -1,8 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "activerecord", "~> 6.1.0"
-gem "activesupport", "~> 6.1.0"
-
-gemspec path: "../"
diff --git a/gemfiles/ar_52.gemfile b/gemfiles/ar_71.gemfile
similarity index 59%
rename from gemfiles/ar_52.gemfile
rename to gemfiles/ar_71.gemfile
index 44ff64e..d490cfb 100644
--- a/gemfiles/ar_52.gemfile
+++ b/gemfiles/ar_71.gemfile
@@ -2,7 +2,7 @@
 
 source "https://rubygems.org"
 
-gem "activerecord", "~> 5.2.0"
-gem "activesupport", "~> 5.2.0"
+gem "activerecord", "~> 7.1"
+gem "activesupport", "~> 7.1"
 
 gemspec path: "../"
diff --git a/gemfiles/ar_60.gemfile b/gemfiles/ar_72.gemfile
similarity index 59%
rename from gemfiles/ar_60.gemfile
rename to gemfiles/ar_72.gemfile
index 16ac8a2..9341e47 100644
--- a/gemfiles/ar_60.gemfile
+++ b/gemfiles/ar_72.gemfile
@@ -2,7 +2,7 @@
 
 source "https://rubygems.org"
 
-gem "activerecord", "~> 6.0.0"
-gem "activesupport", "~> 6.0.0"
+gem "activerecord", "~> 7.2"
+gem "activesupport", "~> 7.2"
 
 gemspec path: "../"
diff --git a/lib/acts_as_recursive_tree/acts_macro.rb b/lib/acts_as_recursive_tree/acts_macro.rb
index 9a094f6..0a321f1 100644
--- a/lib/acts_as_recursive_tree/acts_macro.rb
+++ b/lib/acts_as_recursive_tree/acts_macro.rb
@@ -14,7 +14,7 @@ def recursive_tree(parent_key: :parent_id, parent_type_column: nil, dependent: n
         model_class: self,
         parent_key: parent_key.to_sym,
         parent_type_column: parent_type_column.try(:to_sym),
-        dependent: dependent
+        dependent:
       )
 
       include ActsAsRecursiveTree::Model
diff --git a/lib/acts_as_recursive_tree/builders/ancestors.rb b/lib/acts_as_recursive_tree/builders/ancestors.rb
index a53ff38..690b037 100644
--- a/lib/acts_as_recursive_tree/builders/ancestors.rb
+++ b/lib/acts_as_recursive_tree/builders/ancestors.rb
@@ -5,7 +5,7 @@ module Builders
     class Ancestors < RelationBuilder
       self.traversal_strategy = ActsAsRecursiveTree::Builders::Strategies::Ancestor
 
-      def get_query_options(&block)
+      def get_query_options(&)
         opts = super
         opts.ensure_ordering!
         opts
diff --git a/lib/acts_as_recursive_tree/builders/leaves.rb b/lib/acts_as_recursive_tree/builders/leaves.rb
index 83b31f9..0b2a0d3 100644
--- a/lib/acts_as_recursive_tree/builders/leaves.rb
+++ b/lib/acts_as_recursive_tree/builders/leaves.rb
@@ -16,7 +16,7 @@ def create_select_manger(column = nil)
         select_manager
       end
 
-      def get_query_options(&_block)
+      def get_query_options(&)
         # do not allow any custom options
         ActsAsRecursiveTree::Options::QueryOptions.new
       end
diff --git a/lib/acts_as_recursive_tree/builders/relation_builder.rb b/lib/acts_as_recursive_tree/builders/relation_builder.rb
index 663975d..38714c1 100644
--- a/lib/acts_as_recursive_tree/builders/relation_builder.rb
+++ b/lib/acts_as_recursive_tree/builders/relation_builder.rb
@@ -9,7 +9,7 @@ module Builders
     #
     class RelationBuilder
       def self.build(klass, ids, exclude_ids: false, &block)
-        new(klass, ids, exclude_ids: exclude_ids, &block).build
+        new(klass, ids, exclude_ids:, &block).build
       end
 
       class_attribute :traversal_strategy, instance_writer: false
@@ -48,8 +48,8 @@ def config
       # Subclasses may override this method to provide sane defaults.
       #
       # @return [ActsAsRecursiveTree::Options::QueryOptions] the new QueryOptions instance
-      def get_query_options(&block)
-        ActsAsRecursiveTree::Options::QueryOptions.from(&block)
+      def get_query_options(&)
+        ActsAsRecursiveTree::Options::QueryOptions.from(&)
       end
 
       def base_table
diff --git a/lib/acts_as_recursive_tree/model.rb b/lib/acts_as_recursive_tree/model.rb
index 41b53f9..2f3363d 100644
--- a/lib/acts_as_recursive_tree/model.rb
+++ b/lib/acts_as_recursive_tree/model.rb
@@ -9,16 +9,16 @@ module Model
     #
     # subchild1.ancestors # => [child1, root]
     #
-    def ancestors(&block)
-      base_class.ancestors_of(self, &block)
+    def ancestors(&)
+      base_class.ancestors_of(self, &)
     end
 
     # Returns ancestors and current node itself.
     #
     # subchild1.self_and_ancestors # => [subchild1, child1, root]
     #
-    def self_and_ancestors(&block)
-      base_class.self_and_ancestors_of(self, &block)
+    def self_and_ancestors(&)
+      base_class.self_and_ancestors_of(self, &)
     end
 
     ##
@@ -26,8 +26,8 @@ def self_and_ancestors(&block)
     #
     # root.descendants # => [child1, child2, subchild1, subchild2, subchild3, subchild4]
     #
-    def descendants(&block)
-      base_class.descendants_of(self, &block)
+    def descendants(&)
+      base_class.descendants_of(self, &)
     end
 
     ##
@@ -35,8 +35,8 @@ def descendants(&block)
     #
     # root.self_and_descendants # => [root, child1, child2, subchild1, subchild2, subchild3, subchild4]
     #
-    def self_and_descendants(&block)
-      base_class.self_and_descendants_of(self, &block)
+    def self_and_descendants(&)
+      base_class.self_and_descendants_of(self, &)
     end
 
     ##
@@ -50,7 +50,7 @@ def root
     #
     # subchild1.siblings # => [subchild2]
     def siblings
-      self_and_siblings.where.not(id: id)
+      self_and_siblings.where.not(id:)
     end
 
     ##
@@ -97,7 +97,7 @@ def leaf?
     # @param includes [Array|Hash] pass the same arguments that should be passed to the #includes() method.
     #
     def preload_tree(includes: nil)
-      ActsAsRecursiveTree::Preloaders::Descendants.new(self, includes: includes).preload!
+      ActsAsRecursiveTree::Preloaders::Descendants.new(self, includes:).preload!
       true
     end
 
@@ -108,28 +108,28 @@ def base_class
     private :base_class
 
     module ClassMethods
-      def self_and_ancestors_of(ids, &block)
-        ActsAsRecursiveTree::Builders::Ancestors.build(self, ids, &block)
+      def self_and_ancestors_of(ids, &)
+        ActsAsRecursiveTree::Builders::Ancestors.build(self, ids, &)
       end
 
-      def ancestors_of(ids, &block)
-        ActsAsRecursiveTree::Builders::Ancestors.build(self, ids, exclude_ids: true, &block)
+      def ancestors_of(ids, &)
+        ActsAsRecursiveTree::Builders::Ancestors.build(self, ids, exclude_ids: true, &)
       end
 
       def roots_of(ids)
         self_and_ancestors_of(ids).roots
       end
 
-      def self_and_descendants_of(ids, &block)
-        ActsAsRecursiveTree::Builders::Descendants.build(self, ids, &block)
+      def self_and_descendants_of(ids, &)
+        ActsAsRecursiveTree::Builders::Descendants.build(self, ids, &)
       end
 
-      def descendants_of(ids, &block)
-        ActsAsRecursiveTree::Builders::Descendants.build(self, ids, exclude_ids: true, &block)
+      def descendants_of(ids, &)
+        ActsAsRecursiveTree::Builders::Descendants.build(self, ids, exclude_ids: true, &)
       end
 
-      def leaves_of(ids, &block)
-        ActsAsRecursiveTree::Builders::Leaves.build(self, ids, &block)
+      def leaves_of(ids, &)
+        ActsAsRecursiveTree::Builders::Leaves.build(self, ids, &)
       end
     end
   end
diff --git a/lib/acts_as_recursive_tree/version.rb b/lib/acts_as_recursive_tree/version.rb
index 70c73cd..50201d1 100644
--- a/lib/acts_as_recursive_tree/version.rb
+++ b/lib/acts_as_recursive_tree/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module ActsAsRecursiveTree
-  VERSION = '3.5.0'
+  VERSION = '4.0.0'
 end
diff --git a/spec/db/database.rb b/spec/db/database.rb
index f0ce625..b7b95a5 100644
--- a/spec/db/database.rb
+++ b/spec/db/database.rb
@@ -10,7 +10,7 @@
 
 ActiveRecord::Migration.verbose = false
 
-ActiveRecord::Base.configurations = YAML.safe_load(File.read("#{database_folder}/database.yml"))
+ActiveRecord::Base.configurations = YAML.safe_load_file("#{database_folder}/database.yml")
 
 if ActiveRecord.version >= Gem::Version.new('6.1.0')
   config = ActiveRecord::Base.configurations.configs_for env_name: database_adapter, name: 'primary'
diff --git a/spec/db/models.rb b/spec/db/models.rb
index a90ee91..f189f07 100644
--- a/spec/db/models.rb
+++ b/spec/db/models.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 # Base test class
-class ApplicationRecord < ::ActiveRecord::Base
+class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
 
   extend ActsAsRecursiveTree::ActsMacro
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 14d316b..c52dc85 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -13,7 +13,7 @@
 
 # Requires supporting ruby files with custom matchers and macros, etc,
 # in spec/support/ and its subdirectories.
-Dir[File.join(__dir__, 'support/**/*.rb')].sort.each { |f| require f }
+Dir[File.join(__dir__, 'support/**/*.rb')].each { |f| require f }
 
 # This file was generated by the `rspec --init` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
diff --git a/spec/support/shared_examples/builders.rb b/spec/support/shared_examples/builders.rb
index c65deb7..e24bf62 100644
--- a/spec/support/shared_examples/builders.rb
+++ b/spec/support/shared_examples/builders.rb
@@ -15,7 +15,7 @@
   let(:exclude_ids) { false }
   let(:proc) { nil }
   let(:builder) do
-    described_class.new(model_class, model_id, exclude_ids: exclude_ids, &proc)
+    described_class.new(model_class, model_id, exclude_ids:, &proc)
   end
 end
 
diff --git a/spec/support/tree_methods.rb b/spec/support/tree_methods.rb
index 3ecdb98..464cc82 100644
--- a/spec/support/tree_methods.rb
+++ b/spec/support/tree_methods.rb
@@ -14,8 +14,8 @@ def create_tree(max_level, current_level: 0, node: nil, create_node_info: false,
         max_level,
         current_level: current_level + 1,
         node: child,
-        create_node_info: create_node_info,
-        stop_at: stop_at
+        create_node_info:,
+        stop_at:
       )
     end
     node