diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3ae98ce..c113c04 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,8 +14,9 @@ jobs:
     strategy:
       matrix:
         ruby:
-          - '3.1.2'
-          - '2.7.6'
+          - '3.4.4'
+          - '3.3.8'
+          - '3.2.8'
 
     steps:
     - name: Setup Graphviz
@@ -26,5 +27,7 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true
+    - name: Check rubocop version
+      run: bundle exec rubocop -v
     - name: Run the default task
       run: bundle exec rake
diff --git a/.gitignore b/.gitignore
index b04a8c8..c19ee6e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,6 @@
 
 # rspec failure tracking
 .rspec_status
+
+Gemfile.lock
+.ruby-version
diff --git a/.rubocop.yml b/.rubocop.yml
index 0283986..57834cd 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,5 +1,5 @@
 AllCops:
-  TargetRubyVersion: 2.6
+  TargetRubyVersion: 3.2
   SuggestExtensions: false
   NewCops: enable
   Exclude:
diff --git a/Gemfile b/Gemfile
index 42f6d6f..3dda896 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,10 +5,11 @@ source "https://rubygems.org"
 # Specify your gem's dependencies in snapbot.gemspec
 gemspec
 
-gem "launchy", "~> 2.5.0"
-
+# Development dependencies
+gem "launchy", "~> 2.5"
 gem "rake", "~> 13.0"
-
-gem "rspec", "~> 3.0"
-
-gem "rubocop", "~> 1.21"
+gem "rbs", "~> 3.9"
+gem "rspec", "~> 3.13"
+gem "rubocop", "~> 1.75"
+gem "sqlite3", ">= 2.1"
+gem "steep", "~> 1.10"
diff --git a/lib/snapbot/diagram/dot_generator.rb b/lib/snapbot/diagram/dot_generator.rb
index e81ff23..852edc2 100644
--- a/lib/snapbot/diagram/dot_generator.rb
+++ b/lib/snapbot/diagram/dot_generator.rb
@@ -2,7 +2,7 @@
 
 require "snapbot/reflector"
 
-if defined?(::RSpec)
+if defined?(RSpec)
   require "snapbot/rspec/lets"
   require "binding_of_caller"
 end
diff --git a/snapbot.gemspec b/snapbot.gemspec
index 2a1447d..16c3faa 100644
--- a/snapbot.gemspec
+++ b/snapbot.gemspec
@@ -11,7 +11,7 @@ Gem::Specification.new do |spec|
   spec.summary = "A `save_and_open_diagram` tool to visualise ActiveRecord test records"
   spec.homepage = "https://github.com/rgarner/snapbot"
   spec.license = "MIT"
-  spec.required_ruby_version = ">= 2.6.0"
+  spec.required_ruby_version = ">= 3.2.0"
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = "https://github.com/rgarner/snapbot"
@@ -31,14 +31,9 @@ Gem::Specification.new do |spec|
   spec.add_dependency "binding_of_caller", "~> 1.0"
 
   version_string = [">= 6.1"]
-  spec.add_runtime_dependency "actionpack", version_string
-  spec.add_runtime_dependency "activerecord", version_string
-  spec.add_runtime_dependency "activesupport", version_string
-
-  spec.add_development_dependency "launchy"
-  spec.add_development_dependency "rbs"
-  spec.add_development_dependency "sqlite3"
-  spec.add_development_dependency "steep"
+  spec.add_dependency "actionpack", version_string
+  spec.add_dependency "activerecord", version_string
+  spec.add_dependency "activesupport", version_string
 
   # For more information and examples about making a new gem, check out our
   # guide at: https://bundler.io/guides/creating_gem.html
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index ff0c2c3..bd30bc2 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -2,7 +2,7 @@
 
 require "snapbot"
 
-Dir[File.join(File.dirname(__FILE__), "support", "**", "*.rb")].sort.each { |f| require f }
+Dir[File.join(File.dirname(__FILE__), "support", "**", "*.rb")].each { |f| require f }
 
 RSpec.configure do |config|
   # Enable flags like --only-failures and --next-failure