diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9a735f9..7637b7c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,13 +6,14 @@ jobs:
 
     strategy:
       matrix:
+        ruby-version: [3.3.6]
+        rails-version:
+          - 71
+          - 72
+          - 80
         include:
-          - ruby-version: 3.2.5
+          - ruby-version: 3.2.6
             rails-version: 70
-          - ruby-version: 3.3.5
-            rails-version: 71
-          - ruby-version: 3.3.5
-            rails-version: 72
 
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/rails_${{ matrix.rails-version }}.gemfile
diff --git a/Appraisals b/Appraisals
index 7c041b8..a021427 100644
--- a/Appraisals
+++ b/Appraisals
@@ -11,3 +11,7 @@ end
 appraise 'rails_72' do
   gem 'activesupport', '~>7.2.1'
 end
+
+appraise 'rails_80' do
+  gem 'activesupport', '~>8.0.0'
+end
diff --git a/gemfiles/rails_80.gemfile b/gemfiles/rails_80.gemfile
new file mode 100644
index 0000000..742b67b
--- /dev/null
+++ b/gemfiles/rails_80.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activesupport", "~>8.0.0"
+
+gemspec path: "../"
diff --git a/globalize.gemspec b/globalize.gemspec
index 98e7f83..3529922 100644
--- a/globalize.gemspec
+++ b/globalize.gemspec
@@ -10,9 +10,9 @@ Gem::Specification.new do |s|
 
   s.metadata['rubygems_mfa_required'] = 'true'
 
-  s.add_dependency('actionpack', ['>= 4.0', '< 8'])
-  s.add_dependency('activerecord', ['>= 4.0', '< 8'])
-  s.add_dependency('activesupport', ['>= 4.0', '< 8'])
+  s.add_dependency('actionpack', ['>= 4.0', '< 9'])
+  s.add_dependency('activerecord', ['>= 4.0', '< 9'])
+  s.add_dependency('activesupport', ['>= 4.0', '< 9'])
   s.add_dependency('i18n', '>= 0.8.5')
 
   s.add_development_dependency('mocha')