diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
index e5db68f..88f22d9 100644
--- a/.github/workflows/unit-test.yml
+++ b/.github/workflows/unit-test.yml
@@ -18,7 +18,7 @@ jobs:
             ruby: 3.2
     name: Ruby ${{ matrix.ruby }} unit testing on ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}