diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
index 933d114..303e84e 100644
--- a/.github/workflows/unit-test.yml
+++ b/.github/workflows/unit-test.yml
@@ -14,7 +14,7 @@ jobs:
         os: [ 'ubuntu-latest', 'macOS-latest', 'windows-latest' ]
     name: Ruby ${{ matrix.ruby }} unit testing on ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}