diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 24848b4..a66b511 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.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', '3.4' ]
+        ruby: [ '3.0', '3.1', '3.2', '3.3', '3.4', '4.0' ]
         gemfile:
           - "rack_2"
           - "rack_3"
@@ -14,7 +14,7 @@ jobs:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
     name: Ruby ${{ matrix.ruby }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v7
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with: