diff --git a/.github/workflows/redis.yml b/.github/workflows/redis.yml
index 6c143b0d..23c09c0b 100644
--- a/.github/workflows/redis.yml
+++ b/.github/workflows/redis.yml
@@ -75,7 +75,7 @@ jobs:
           echo "DIGEST_NAME=$(echo ${{ matrix.platform }} | sed 's,/,-,g')" >> $GITHUB_OUTPUT
       - name: Upload digest
         if: ${{ github.event_name != 'pull_request' }}
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: digest-${{ steps.digest.outputs.DIGEST_NAME }}
           path: /tmp/digests/*
diff --git a/.github/workflows/reusable-kumomta-build.yml b/.github/workflows/reusable-kumomta-build.yml
index 4cc22484..fc931285 100644
--- a/.github/workflows/reusable-kumomta-build.yml
+++ b/.github/workflows/reusable-kumomta-build.yml
@@ -102,7 +102,7 @@ jobs:
         ./assets/sign-rpm.sh *.rpm
 
     - name: "Upload artifact"
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: "${{ inputs.artifact_name }}"
         path: |
@@ -227,7 +227,7 @@ jobs:
           touch "${{ runner.temp }}/digests/${digest#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: digests-${{ inputs.artifact_name }}
           path: ${{ runner.temp }}/digests/*