diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5d59072..17d6d63 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ '2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3' ]
+        ruby: [ '2.7', '3.0', '3.1', '3.2', '3.3' ]
     name: Ruby ${{ matrix.ruby }}
     steps:
       - uses: actions/checkout@v2
diff --git a/.gitignore b/.gitignore
index 0cb6eeb..9106b2a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,5 @@
 /.bundle/
 /.yardoc
-/Gemfile.lock
 /_yardoc/
 /coverage/
 /doc/
diff --git a/.rubocop.yml b/.rubocop.yml
index 5fa6fa5..1254141 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,6 +1,3 @@
-AllCops:
-  TargetRubyVersion: 2.3
-
 Metrics/LineLength:
   Max: 120
 
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..a603bb5
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+2.7.5
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..fdc5549
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,82 @@
+PATH
+  remote: .
+  specs:
+    buildkit (1.5.0)
+      sawyer (>= 0.6)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
+    ast (2.4.2)
+    base64 (0.2.0)
+    byebug (11.1.3)
+    diff-lcs (1.5.1)
+    faraday (2.8.1)
+      base64
+      faraday-net_http (>= 2.0, < 3.1)
+      ruby2_keywords (>= 0.0.4)
+    faraday-net_http (3.0.2)
+    json (2.7.1)
+    language_server-protocol (3.17.0.3)
+    parallel (1.24.0)
+    parser (3.3.0.5)
+      ast (~> 2.4.1)
+      racc
+    public_suffix (5.0.5)
+    racc (1.7.3)
+    rainbow (3.1.1)
+    rake (13.2.0)
+    regexp_parser (2.9.0)
+    rexml (3.2.6)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.0)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.1)
+    rubocop (1.61.0)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.31.2)
+      parser (>= 3.3.0.4)
+    ruby-progressbar (1.13.0)
+    ruby2_keywords (0.0.5)
+    sawyer (0.9.2)
+      addressable (>= 2.3.5)
+      faraday (>= 0.17.3, < 3)
+    unicode-display_width (2.5.0)
+    vcr (3.0.3)
+    yard (0.9.36)
+
+PLATFORMS
+  arm64-darwin-23
+
+DEPENDENCIES
+  buildkit!
+  bundler
+  byebug
+  rake
+  rspec (~> 3.2)
+  rubocop (~> 1.61.0)
+  vcr (~> 3.0)
+  yard
+
+BUNDLED WITH
+   2.4.18
diff --git a/buildkit.gemspec b/buildkit.gemspec
index 3bb3320..c79bf10 100644
--- a/buildkit.gemspec
+++ b/buildkit.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
 
   spec.metadata['allowed_push_host'] = 'https://rubygems.org'
 
-  spec.required_ruby_version = '>= 2.3'
+  spec.required_ruby_version = '>= 2.7'
 
   spec.add_dependency 'sawyer', '>= 0.6'
   spec.add_development_dependency 'bundler'
diff --git a/dev.yml b/dev.yml
index 6def94f..d6e7873 100644
--- a/dev.yml
+++ b/dev.yml
@@ -3,7 +3,7 @@ name: buildkit
 type: ruby
 
 up:
-  - ruby: 2.5.5
+  - ruby
   - bundler
 
 commands: