diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 1dee6e1..fd5038a 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -13,7 +13,6 @@ jobs:
       matrix:
         gemfile:
           - Gemfile
-          - gemfiles/Gemfile-rails-6-0
           - gemfiles/Gemfile-rails-6-1
           # - gemfiles/Gemfile-rails-7-0 # This is the main version now
         ruby:
@@ -26,7 +25,7 @@ jobs:
     env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
       BUNDLE_GEMFILE: ${{ github.workspace }}/${{ matrix.gemfile }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}
diff --git a/concurrent_rails.gemspec b/concurrent_rails.gemspec
index 77c61c8..1ce34b5 100644
--- a/concurrent_rails.gemspec
+++ b/concurrent_rails.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
   spec.metadata["changelog_uri"]   = "https://github.com/luizkowalski/concurrent_rails/blob/master/CHANGELOG.md"
   spec.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.md"]
 
-  spec.add_dependency "railties", ">= 6.0"
+  spec.add_dependency "railties", ">= 6.1"
   spec.add_dependency "zeitwerk", "~> 2.6"
 
   spec.required_ruby_version = ">= 3.0"
diff --git a/gemfiles/Gemfile-rails-6-0 b/gemfiles/Gemfile-rails-6-0
deleted file mode 100644
index d8432cb..0000000
--- a/gemfiles/Gemfile-rails-6-0
+++ /dev/null
@@ -1,13 +0,0 @@
-# frozen_string_literal: true
-
-source "https://rubygems.org"
-
-gemspec path: ".."
-
-gem "rails", github: "rails/rails", branch: "6-0-stable"
-gem "minitest-reporters", "~> 1.6"
-gem "rubocop", "~> 1.55"
-gem "rubocop-minitest", "~> 0.31"
-gem "rubocop-performance", "~> 1.18"
-gem "rubocop-thread_safety", "~> 0.5"
-gem "sqlite3", "~> 1.6"