diff --git a/.github/workflows/test-doc-build.yml b/.github/workflows/test-doc-build.yml
index f594ace..1885d25 100644
--- a/.github/workflows/test-doc-build.yml
+++ b/.github/workflows/test-doc-build.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with: