diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3b6cf9e..2acc703 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,14 +10,23 @@ jobs:
           - '3.0'
           - '3.1'
           - '3.2'
+          - '3.3'
         gemfile:
           - gemfiles/Gemfile.rails61
           - gemfiles/Gemfile.rails70
+          - gemfiles/Gemfile.rails71
+          - gemfiles/Gemfile.rails72
         exclude:
-          # rails 7.0 requires ruby >= 2.7
+          # rails 7.2 requires ruby >= 3.1
           # https://www.fastruby.io/blog/ruby/rails/versions/compatibility-table.html
-          - ruby-version: '2.6'
-            gemfile: 'gemfiles/Gemfile.rails70'
+          - ruby-version: '3.0'
+            gemfile: 'gemfiles/Gemfile.rails72'
+          # rails 8.0 requires ruby >= 3.2
+          # https://www.fastruby.io/blog/ruby/rails/versions/compatibility-table.html
+          - ruby-version: '3.0'
+            gemfile: 'gemfiles/Gemfile.rails80'
+          - ruby-version: '3.1'
+            gemfile: 'gemfiles/Gemfile.rails80'
 
     name: Ruby ${{ matrix.ruby-version }} / Bundle ${{ matrix.gemfile }}
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d49f87..bc62a11 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,10 @@
 ## [Unreleased]
+* No unreleased changes
+
+## 3.3.2 / 2025-06-09
+### Fixed
+* Support Ruby 3.2 and 3.3 and Rails 7.1 and 7.2
+
 ### Added
 * Support Ruby 3.2. Drop support for Ruby 2.7, Rails 6.0
 
diff --git a/app/helpers/ndr_ui/bootstrap_helper.rb b/app/helpers/ndr_ui/bootstrap_helper.rb
index 5c208f8..c47d85b 100644
--- a/app/helpers/ndr_ui/bootstrap_helper.rb
+++ b/app/helpers/ndr_ui/bootstrap_helper.rb
@@ -1,6 +1,6 @@
 module NdrUi
   # Provides helper methods for the Twitter Bootstrap framework
-  module BootstrapHelper
+  module BootstrapHelper # rubocop:disable Metrics/ModuleLength
     include ::NdrUi::Bootstrap::BreadcrumbsHelper
     include ::NdrUi::Bootstrap::DropdownHelper
     include ::NdrUi::Bootstrap::ModalHelper
@@ -594,7 +594,12 @@ def ndr_can?(action, subject, *extra_args)
       return true unless respond_to?(:can?)
 
       unless subject.is_a?(ActiveRecord::Base)
-        ActiveSupport::Deprecation.warn(<<~MSG)
+        deprecator = if Rails.application.respond_to?(:deprecators)
+                       Rails.application.deprecators[:active_support]
+                     else
+                       ActiveSupport::Deprecation # Rails <= 7.0
+                     end
+        deprecator.warn(<<~MSG)
           Attempting to authorise a non-resource object causes authorisation to be skipped.
           In future, this behaviour may change; please use a resource where possible.
         MSG
diff --git a/gemfiles/Gemfile.rails61 b/gemfiles/Gemfile.rails61
index e17af7b..8fdb206 100644
--- a/gemfiles/Gemfile.rails61
+++ b/gemfiles/Gemfile.rails61
@@ -4,3 +4,9 @@ gemspec path: '..'
 
 gem 'rails', '~> 6.1.0'
 
+# Rails 6.1 does not support sqlite3 2.x; it specifies gem "sqlite3", "~> 1.4"
+# in lib/active_record/connection_adapters/sqlite3_adapter.rb
+gem 'sqlite3', '~> 1.7'
+
+# Latest concurrent-ruby breaks Rails < 7.1. See https://github.com/rails/rails/issues/54260
+gem 'concurrent-ruby', '1.3.4'
diff --git a/gemfiles/Gemfile.rails70 b/gemfiles/Gemfile.rails70
index 73abd4b..a35c58c 100644
--- a/gemfiles/Gemfile.rails70
+++ b/gemfiles/Gemfile.rails70
@@ -3,3 +3,10 @@ source 'https://rubygems.org'
 gemspec path: '..'
 
 gem 'rails',  '~> 7.0.0'
+
+# Rails 7.0 does not support sqlite3 2.x; it specifies gem "sqlite3", "~> 1.4"
+# in lib/active_record/connection_adapters/sqlite3_adapter.rb
+gem 'sqlite3', '~> 1.7'
+
+# Latest concurrent-ruby breaks Rails < 7.1. See https://github.com/rails/rails/issues/54260
+gem 'concurrent-ruby', '1.3.4'
diff --git a/gemfiles/Gemfile.rails71 b/gemfiles/Gemfile.rails71
new file mode 100644
index 0000000..10c4cfc
--- /dev/null
+++ b/gemfiles/Gemfile.rails71
@@ -0,0 +1,8 @@
+source 'https://rubygems.org'
+
+gemspec path: '..'
+
+gem 'rails',  '~> 7.1.0'
+
+# sqlite3 2.x is not supported on ruby 3.0
+gem 'sqlite3', '~> 1.7'
diff --git a/gemfiles/Gemfile.rails72 b/gemfiles/Gemfile.rails72
new file mode 100644
index 0000000..474de75
--- /dev/null
+++ b/gemfiles/Gemfile.rails72
@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+gemspec path: '..'
+
+gem 'rails',  '~> 7.2.0'
diff --git a/lib/ndr_ui/version.rb b/lib/ndr_ui/version.rb
index 58cf003..8896c95 100644
--- a/lib/ndr_ui/version.rb
+++ b/lib/ndr_ui/version.rb
@@ -2,5 +2,5 @@
 
 # This stores the current version of the NdrUi gem. Use semantic versioning http://semver.org
 module NdrUi
-  VERSION = '3.3.1'
+  VERSION = '3.3.2'
 end
diff --git a/ndr_ui.gemspec b/ndr_ui.gemspec
index af3419e..c20f15c 100644
--- a/ndr_ui.gemspec
+++ b/ndr_ui.gemspec
@@ -6,6 +6,7 @@ unless Gem::Version.new(Gem::VERSION) >= Gem::Version.new('3.0.2')
   raise 'Please update RubyGems to at least 3.0.2 - lower versions build a broken ndr_ui.gem!'
 end
 
+# rubocop:disable Gemspec/DevelopmentDependencies
 Gem::Specification.new do |spec|
   spec.name          = 'ndr_ui'
   spec.version       = NdrUi::VERSION
@@ -22,12 +23,15 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 3.0.0'
 
-  spec.add_dependency 'rails', '>= 6.1', '< 7.1'
+  spec.add_dependency 'rails', '>= 6.1', '< 7.3'
   spec.add_dependency 'bootstrap-sass', '~> 3.4.1'
   spec.add_dependency 'jquery-rails', '>= 4.1.0'
   spec.add_dependency 'sprockets', '>= 4.0'
   spec.add_dependency 'sprockets-rails', '>= 3.0.0'
 
+  # Rails 6.1 and 7.0 do not support sqlite3 2.x; they specify gem "sqlite3", "~> 1.4"
+  # in lib/active_record/connection_adapters/sqlite3_adapter.rb
+  # cf. gemfiles/Gemfile.rails70
   spec.add_development_dependency 'sqlite3'
 
   spec.add_development_dependency 'mocha', '~> 2.0'
@@ -38,3 +42,4 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'simplecov'
 end
+# rubocop:enable Gemspec/DevelopmentDependencies
diff --git a/test/builders/ndr_ui/bootstrap_builder/error_and_warning_alert_boxes_test.rb b/test/builders/ndr_ui/bootstrap_builder/error_and_warning_alert_boxes_test.rb
index 93d4e63..1cea681 100644
--- a/test/builders/ndr_ui/bootstrap_builder/error_and_warning_alert_boxes_test.rb
+++ b/test/builders/ndr_ui/bootstrap_builder/error_and_warning_alert_boxes_test.rb
@@ -78,7 +78,7 @@ class ErrorAndWarningAlertBoxesTest < ActionView::TestCase
     post.warnings.add(:somewhere2, 'Warning 2')
 
     bootstrap_form_for post do |form|
-      @output_buffer = form.error_and_warning_alert_boxes
+      @output_buffer = ActionView::OutputBuffer.new(form.error_and_warning_alert_boxes)
 
       assert_select 'div.alert', 1
       assert_select 'div.alert.alert-warning' do
diff --git a/test/builders/ndr_ui/bootstrap_builder/label_tooltips_test.rb b/test/builders/ndr_ui/bootstrap_builder/label_tooltips_test.rb
index 1a67210..b71db6b 100644
--- a/test/builders/ndr_ui/bootstrap_builder/label_tooltips_test.rb
+++ b/test/builders/ndr_ui/bootstrap_builder/label_tooltips_test.rb
@@ -133,6 +133,7 @@ def setup
     assert_select '.question-tooltip', title: 'Time post was last updated'
     assert_select 'label[for=post_updated_at]', text: 'Updated'
 
+    reset_output_buffer!
     @output_buffer =
       bootstrap_form_for post do |form|
         form.label :updated_at, tooltip: false
diff --git a/test/builders/ndr_ui/bootstrap_builder/readonly_test.rb b/test/builders/ndr_ui/bootstrap_builder/readonly_test.rb
index 8fda597..8160538 100644
--- a/test/builders/ndr_ui/bootstrap_builder/readonly_test.rb
+++ b/test/builders/ndr_ui/bootstrap_builder/readonly_test.rb
@@ -44,7 +44,7 @@ class ReadonlyTest < ActionView::TestCase
     end
 
     bootstrap_form_for post do |form|
-      form.fields_for(:sub_records, readonly: true) do |sub_form|
+      form.fields_for(:sub_records, nil, readonly: true) do |sub_form|
         assert sub_form.readonly?
         refute form.readonly?
       end
@@ -63,6 +63,7 @@ class ReadonlyTest < ActionView::TestCase
     assert_select 'input[type=text]#post_created_at'
     assert_select 'p.form-control-static', 0
 
+    reset_output_buffer!
     @output_buffer =
       bootstrap_form_for post, readonly: true do |form|
         form.text_field :created_at
@@ -95,6 +96,7 @@ class ReadonlyTest < ActionView::TestCase
     assert_select 'input[type=hidden]#post_created_at'
     assert_select 'p.form-control-static', 0
 
+    reset_output_buffer!
     @output_buffer =
       bootstrap_form_for post, readonly: true do |form|
         form.hidden_field :created_at
@@ -112,6 +114,7 @@ class ReadonlyTest < ActionView::TestCase
       assert_select 'label', text: I18n.t('activerecord.attributes.post.updated_at')
     end
 
+    reset_output_buffer!
     bootstrap_form_for post, readonly: true do |form|
       @output_buffer = form.label(:updated_at)
       assert_select 'label', text: I18n.t('activerecord.attributes.post.updated_at')
diff --git a/test/dummy/config/application.rb b/test/dummy/config/application.rb
index a14250c..e0dae17 100644
--- a/test/dummy/config/application.rb
+++ b/test/dummy/config/application.rb
@@ -8,7 +8,7 @@
 module Dummy
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 6.1
+    config.load_defaults Rails.version.match(/[0-9]*[.][0-9]*/).to_s # e.g. 7.2
 
     # Configuration for the application, engines, and railties goes here.
     #
diff --git a/test/helpers/ndr_ui/bootstrap/modal_helper_test.rb b/test/helpers/ndr_ui/bootstrap/modal_helper_test.rb
index 9305c41..b42a1a4 100644
--- a/test/helpers/ndr_ui/bootstrap/modal_helper_test.rb
+++ b/test/helpers/ndr_ui/bootstrap/modal_helper_test.rb
@@ -10,6 +10,7 @@ class ModalHelperTest < ActionView::TestCase
           assert_select 'div.modal-content', 'Pear form'
         end
 
+        reset_output_buffer!
         @output_buffer = bootstrap_modal_dialog_tag(size: 'lg') { 'Pear form' }
         assert_select 'div.modal-dialog.modal-lg' do
           assert_select 'div.modal-content', 'Pear form'
@@ -58,6 +59,7 @@ class ModalHelperTest < ActionView::TestCase
                         text: 'Close'
         end
 
+        reset_output_buffer!
         @output_buffer = bootstrap_modal_footer_tag('Non-readonly button text', readonly: false)
         assert_select 'div.modal-footer' do
           assert_select 'button.btn.btn-default',
@@ -77,6 +79,7 @@ class ModalHelperTest < ActionView::TestCase
                         text: 'Close'
         end
 
+        reset_output_buffer!
         @output_buffer = bootstrap_modal_footer_tag(readonly: false) do
           button_tag('Non-readonly default', class: 'btn btn-default', "data-dismiss": 'modal') +
             button_tag('Non-readonly primary', class: 'btn btn-primary', "data-dismiss": 'modal')
@@ -99,6 +102,7 @@ class ModalHelperTest < ActionView::TestCase
                         text: 'Close'
         end
 
+        reset_output_buffer!
         @output_buffer = bootstrap_modal_footer_tag(readonly: false)
         assert_select 'div.modal-footer' do
           assert_select 'button.btn.btn-default',
@@ -125,6 +129,7 @@ class ModalHelperTest < ActionView::TestCase
           end
         end
 
+        reset_output_buffer!
         @output_buffer = bootstrap_modal_box('New Pear') { 'Pear form' }
         assert_select 'div.modal-dialog' do
           assert_select 'div.modal-content' do
@@ -151,6 +156,7 @@ class ModalHelperTest < ActionView::TestCase
           end
         end
 
+        reset_output_buffer!
         @output_buffer = bootstrap_modal_box('New Pear', 'Pear form', readonly: false)
         assert_select 'div.modal-dialog' do
           assert_select 'div.modal-content' do
@@ -169,9 +175,11 @@ class ModalHelperTest < ActionView::TestCase
         @output_buffer = bootstrap_modal_box('New Pear', 'Pear form', size: 'lg')
         assert_select 'div.modal-dialog.modal-lg'
 
+        reset_output_buffer!
         @output_buffer = bootstrap_modal_box('New Pear', size: 'lg') { 'Pear form' }
         assert_select 'div.modal-dialog.modal-lg'
 
+        reset_output_buffer!
         @output_buffer = bootstrap_modal_box('New Pear', 'Pear form', size: 'enormous')
         assert_select 'div.modal-dialog.modal-enormous', 0
       end
diff --git a/test/helpers/ndr_ui/bootstrap_helper_test.rb b/test/helpers/ndr_ui/bootstrap_helper_test.rb
index 2c82d64..f6a932c 100644
--- a/test/helpers/ndr_ui/bootstrap_helper_test.rb
+++ b/test/helpers/ndr_ui/bootstrap_helper_test.rb
@@ -156,6 +156,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me[autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_for(
         :post,
         url: posts_path,
@@ -165,6 +166,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me.form-inline[autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_for(
         :post,
         url: posts_path,
@@ -174,6 +176,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me[data-controller=form][autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_for(
         :post,
         url: posts_path,
@@ -183,6 +186,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me[data-controller="additional form"][autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_for(
         :post,
         url: posts_path,
@@ -210,6 +214,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me[autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_with(
         model: Post.new,
         html: { id: 'preserve_me', class: 'form-inline' }
@@ -218,6 +223,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me.form-inline[autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_with(
         model: Post.new,
         html: { id: 'preserve_me' }
@@ -226,6 +232,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me[data-controller=form][autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_with(
         model: Post.new,
         html: { id: 'preserve_me', 'data-controller': 'additional' }
@@ -234,6 +241,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me[data-controller="additional form"][autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_with(
         model: Post.new,
         horizontal: true, html: { id: 'preserve_me' }
@@ -242,6 +250,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me.form-horizontal[autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_with(
         url: posts_path,
         html: { id: 'preserve_me' }
@@ -250,6 +259,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me[autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_with(
         url: posts_path,
         html: { id: 'preserve_me', class: 'form-inline' }
@@ -258,6 +268,7 @@ class BootstrapHelperTest < ActionView::TestCase
       end
       assert_select 'form#preserve_me.form-inline[autocomplete=off][action="/posts"]'
 
+      reset_output_buffer!
       @output_buffer = bootstrap_form_with(
         url: posts_path,
         horizontal: true, html: { id: 'preserve_me' }
@@ -494,13 +505,14 @@ class BootstrapHelperTest < ActionView::TestCase
     end
 
     test 'non authorisable link with non-resource is not deprecated' do
-      assert_not_deprecated { details_link('#') }
+      assert_not_deprecated(active_support_deprecator) { details_link('#') }
     end
 
     test 'authorisable link with non-resource is deprecated' do
       stubs(can?: true)
 
-      actual   = assert_deprecated(/authorise a non-resource object/) { details_link('#') }
+      actual   = assert_deprecated(/authorise a non-resource object/,
+                                   active_support_deprecator) { details_link('#') }
       expected = '<a title="Details" class="btn btn-default btn-xs" href="#">' \
                  '<span class="glyphicon glyphicon-share-alt"></span></a>'
 
@@ -563,5 +575,11 @@ class BootstrapHelperTest < ActionView::TestCase
     end
 
     # TODO: bootstrap_will_paginate(collection = nil, options = {})
+
+    def active_support_deprecator
+      return nil unless Rails.application.respond_to?(:deprecators) # Rails <= 7.0
+
+      Rails.application.deprecators[:active_support]
+    end
   end
 end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 176cee9..fe8b739 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -35,4 +35,12 @@ def unsafe_string
   end
 end
 
+module ActionView
+  class TestCase
+    def reset_output_buffer!
+      @output_buffer = ActionView::OutputBuffer.new
+    end
+  end
+end
+
 require 'mocha/minitest'