diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eb22daa..1ed57f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,9 +10,9 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: ['3.2', '3.1', '3.0', '2.7']
+        ruby: ['3.3', '3.2', '3.1']
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Ruby ${{ matrix.ruby }}
         uses: ruby/setup-ruby@v1
         with: