diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3916cc0..adf5557 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,8 +17,6 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         version:
           [
-            '3.0',
-            3.1,
             3.2,
             3.3,
             3.4,
diff --git a/.rubocop.yml b/.rubocop.yml
index 072ae4c..d10a878 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,7 +1,7 @@
 require: rubocop-performance
 
 AllCops:
-    TargetRubyVersion: '3.0'
+    TargetRubyVersion: '3.2'
     NewCops: enable
 
 # Metrics are too arbitrary.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0220e63..1d4ebd4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 1.4.0
+
+* Ruby 3.2+ is now required. If you're using Ruby 3.0 or 3.1, please use
+  version 1.3.2 of this gem.
+
 ## 1.3.2 (2025-04-03)
 
 * Re-release to fix a release script problem. There are no code changes.
diff --git a/README.md b/README.md
index 6107949..6182c67 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ For more information see the
 
 ## Requirements
 
-This code requires Ruby version 3.0 or higher.
+This code requires Ruby version 3.2 or higher.
 
 ## Contributing
 
diff --git a/maxmind-db.gemspec b/maxmind-db.gemspec
index 1d656d8..ff47380 100644
--- a/maxmind-db.gemspec
+++ b/maxmind-db.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
     'source_code_uri' => 'https://github.com/maxmind/MaxMind-DB-Reader-ruby',
     'rubygems_mfa_required' => 'true',
   }
-  s.required_ruby_version = '>= 3.0'
+  s.required_ruby_version = '>= 3.2'
 
   s.add_development_dependency 'minitest'
   s.add_development_dependency 'rake'