diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 76e1948..d052820 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,12 +14,13 @@ jobs:
     strategy:
       matrix:
         ruby-version:
+          - 3.3
           - 3.2
           - 3.1
           - "3.0"
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Ruby ${{ matrix.ruby-version }}
         uses: ruby/setup-ruby@v1
         with: