diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3021024..fc168c4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['3.1', '3.2']
+        ruby-version: ['3.2', '3.3']
 
     steps:
       - uses: actions/checkout@v4
diff --git a/.rubocop.yml b/.rubocop.yml
index 8355148..09cd38d 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -6,7 +6,7 @@ require:
   - test_prof/rubocop
 
 AllCops:
-  TargetRubyVersion: 2.7
+  TargetRubyVersion: 3.2
   NewCops: enable
 
 Naming/VariableNumber:
diff --git a/.tool-versions b/.tool-versions
index 520a168..c1c77c3 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-ruby 3.1.3
+ruby 3.2.3
diff --git a/gobstones.gemspec b/gobstones.gemspec
index 415d554..109ae2a 100644
--- a/gobstones.gemspec
+++ b/gobstones.gemspec
@@ -13,7 +13,7 @@ Gem::Specification.new do |spec|
   spec.summary = 'Ruby implementation of the Gobstones programming language'
   spec.description = 'Ruby implementation of the Gobstones programming language'
 
-  spec.required_ruby_version = '>= 2.7'
+  spec.required_ruby_version = '>= 3.2'
   spec.required_rubygems_version = '>= 2.7.6'
 
   spec.add_dependency 'treetop', '~> 1.6'