diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5e6ed6c..2d8eb9c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,31 +4,17 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
 
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '2.4', '2.5', '2.6', '2.7', '3.0', '3.1' ]
-        bundler: [ '1.17.3', '2.1.4' ]
+        ruby: [ '2.7', '3.0', '3.1', '3.2', '3.3' ]
         database: [ 'mysql', 'postgresql', 'sqlite' ]
-        exclude:
-          - ruby: '2.4'
-            bundler: '2.1.4'
-          - ruby: '2.5'
-            bundler: '2.1.4'
-          - ruby: '2.6'
-            bundler: '2.1.4'
-          - ruby: '2.7'
-            bundler: '1.17.3'
-          - ruby: '3.0'
-            bundler: '1.17.3'
-          - ruby: '3.1'
-            bundler: '1.17.3'
 
     services:
       postgres:
-        image: postgres:13.5
+        image: postgres:16
         env:
           POSTGRES_USER: root
           POSTGRES_PASSWORD: gutentag
@@ -47,26 +33,14 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up ruby
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
-          bundler: ${{ matrix.bundler }}
           bundler-cache: true
-
-      - name: Set up Bundler
-        run: |
-          export BUNDLER_VERSION=${{ matrix.bundler }}
-          export BUNDLE_PATH=$PWD/vendor/bundle
-
-          gem update --system
-
-          bundle _${{ matrix.bundler }}_ config set path $PWD/$BUNDLE_PATH
-          bundle _${{ matrix.bundler }}_ install --jobs=4 --retry=3
-          bundle _${{ matrix.bundler }}_ update
       - name: Set up Appraisal
-        run: bundle exec appraisal update
+        run: bundle exec appraisal install
       - name: Test
         env:
           CI: "true"
@@ -77,16 +51,15 @@ jobs:
         run: bundle exec appraisal rspec
 
   rubocop:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
 
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up ruby
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.7
-          bundler: 2.1.4
           bundler-cache: true
       - name: Rubocop
         run: bundle exec rubocop
diff --git a/Appraisals b/Appraisals
index e17956a..95d6dad 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,59 +1,51 @@
 # frozen_string_literal: true
 
-appraise "rails_4_0" do
-  gem "rails",   "~> 4.0.13"
-  gem "mysql2",  "~> 0.3.10", :platform => :ruby
-end if RUBY_VERSION.to_f < 2.4
-
-appraise "rails_4_1" do
-  gem "rails",   "~> 4.1.16"
-  gem "mysql2",  "~> 0.3.13", :platform => :ruby
-end if RUBY_VERSION.to_f < 2.4
-
-appraise "rails_4_2" do
-  gem "rails",   "~> 4.2.8"
-  gem "mysql2",  "~> 0.4.0", :platform => :ruby
-
-  gem "activerecord-jdbcmysql-adapter",      "~> 1.3.23", :platform => :jruby
-  gem "activerecord-jdbcpostgresql-adapter", "~> 1.3.23", :platform => :jruby
-  gem "activerecord-jdbcsqlite3-adapter",    "~> 1.3.23", :platform => :jruby
-end if RUBY_VERSION.to_f < 2.7
-
-appraise "rails_5_0" do
-  gem "rails",  "~> 5.0.3"
-  gem "mysql2", "~> 0.4.0", :platform => :ruby
-end if RUBY_VERSION.to_f >= 2.2 && RUBY_VERSION.to_f <= 2.7
-
-appraise "rails_5_1" do
-  gem "rails",  "~> 5.1.1"
-  gem "mysql2", "~> 0.4.0", :platform => :ruby
-end if RUBY_VERSION.to_f >= 2.2 && RUBY_VERSION.to_f <= 2.7
-
 appraise "rails_5_2" do
   gem "rails",  "~> 5.2.0"
   gem "pg",     "~> 1.0",   :platform => :ruby
   gem "mysql2", "~> 0.5.0", :platform => :ruby
-end if RUBY_VERSION.to_f >= 2.2 && RUBY_VERSION.to_f <= 2.7
+end if RUBY_VERSION.to_f <= 2.7
 
 if RUBY_PLATFORM != "java"
   appraise "rails_6_0" do
     gem "rails",   "~> 6.0.0"
     gem "pg",      "~> 1.0",   :platform => :ruby
     gem "mysql2",  "~> 0.5.0", :platform => :ruby
-    gem "sqlite3", "~> 1.4",   :platform => :ruby
-  end if RUBY_VERSION.to_f >= 2.5 && RUBY_VERSION.to_f <= 3.0
+    gem "sqlite3", ">= 1.4",   :platform => :ruby
+  end if RUBY_VERSION.to_f <= 2.7
 
   appraise "rails_6_1" do
     gem "rails",   "~> 6.1.0"
     gem "pg",      "~> 1.0",   :platform => :ruby
     gem "mysql2",  "~> 0.5.0", :platform => :ruby
-    gem "sqlite3", "~> 1.4",   :platform => :ruby
-  end if RUBY_VERSION.to_f >= 2.5
+    gem "sqlite3", ">= 1.4",   :platform => :ruby
+  end
 
   appraise "rails_7_0" do
-    gem "rails",   "~> 7.0.1"
+    gem "rails",   "~> 7.0.8.6"
+    gem "pg",      "~> 1.0",   :platform => :ruby
+    gem "mysql2",  "~> 0.5.0", :platform => :ruby
+    gem "sqlite3", ">= 1.4",   :platform => :ruby
+  end
+
+  appraise "rails_7_1" do
+    gem "rails",   "~> 7.1.5"
+    gem "pg",      "~> 1.0",   :platform => :ruby
+    gem "mysql2",  "~> 0.5.0", :platform => :ruby
+    gem "sqlite3", "~> 2.0",   :platform => :ruby
+  end
+
+  appraise "rails_7_2" do
+    gem "rails",   "~> 7.2.2"
+    gem "pg",      "~> 1.0",   :platform => :ruby
+    gem "mysql2",  "~> 0.5.0", :platform => :ruby
+    gem "sqlite3", "~> 2.0",   :platform => :ruby
+  end if RUBY_VERSION.to_f >= 3.1
+
+  appraise "rails_8_0" do
+    gem "rails",   "~> 8.0.0"
     gem "pg",      "~> 1.0",   :platform => :ruby
     gem "mysql2",  "~> 0.5.0", :platform => :ruby
-    gem "sqlite3", "~> 1.4",   :platform => :ruby
-  end if RUBY_VERSION.to_f >= 2.7
+    gem "sqlite3", "~> 2.3",   :platform => :ruby
+  end if RUBY_VERSION.to_f >= 3.2
 end
diff --git a/Gemfile b/Gemfile
index c6b68c5..1530597 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,22 +4,20 @@ source "https://rubygems.org"
 
 gemspec
 
-gem "test-unit", :platform => :ruby_22
-
-gem "mysql2",  "~> 0.3",    :platform => :ruby
-gem "pg",      "~> 0.18",   :platform => :ruby
+gem "mysql2",  "~> 0.5", :platform => :ruby
+gem "pg",      "~> 1.0", :platform => :ruby
 
 if RUBY_VERSION.to_f < 3.0
   gem "sqlite3", "~> 1.3.13"
 else
-  gem "sqlite3", "~> 1.4"
+  gem "sqlite3", ">= 1.4"
 end
 
 gem "activerecord-jdbcmysql-adapter",      ">= 1.3.23", :platform => :jruby
 gem "activerecord-jdbcpostgresql-adapter", ">= 1.3.23", :platform => :jruby
 gem "activerecord-jdbcsqlite3-adapter",    ">= 1.3.23", :platform => :jruby
 
-gem "activerecord", [">= 3.2.22"] if RUBY_PLATFORM == "java"
+gem "activerecord", [">= 5.2"] if RUBY_PLATFORM == "java"
 
 # Required for testing Rails 6.1 on MRI 3.1+
 gem "net-smtp" if RUBY_VERSION.to_f > 3.0
diff --git a/README.md b/README.md
index 356773e..2c8ad9e 100644
--- a/README.md
+++ b/README.md
@@ -95,8 +95,8 @@ Gutentag::Tag.names_for_scope(Article.order(created_at: :desc).limit(2))
 
 These are the versions the test suite runs against. It's possible it may work on older versions of Ruby, but it definitely won't work on older versions of Rails.
 
-* Ruby: MRI v2.3-v3.1, JRuby v9.2.5
-* Rails/ActiveRecord: v4.0-v7.0
+* Ruby: MRI v2.7-v3.3
+* Rails/ActiveRecord: v5.2-v8.0
 
 If you're using MRI v2.2 and/or ActiveRecord v3.2, the last version of Gutentag that fully supported those versions is v2.4.1.