diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0ffebc8..816688a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -56,7 +56,7 @@ jobs:
           - "debian-14"
           - "debian-13"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Parse ID
         run: |
           set -x
@@ -128,7 +128,7 @@ jobs:
           echo "ref: ${GITHUB_REF}"
           echo "tags: ${TAGS}"
           echo "digest: ${{ steps.build-push.outputs.digest }}"
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           path: pgroonga
           ref: ${{ env.PGROONGA_REF }}