diff --git a/.github/workflows/kumomta.yml b/.github/workflows/kumomta.yml
index 65904aed..f7761491 100644
--- a/.github/workflows/kumomta.yml
+++ b/.github/workflows/kumomta.yml
@@ -187,7 +187,7 @@ jobs:
             type=ref,event=pr
 
       - name: Download digests
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           path: ${{ runner.temp }}/digests
           pattern: digests-*
diff --git a/.github/workflows/redis.yml b/.github/workflows/redis.yml
index 4b73d71a..bdeb8bec 100644
--- a/.github/workflows/redis.yml
+++ b/.github/workflows/redis.yml
@@ -92,7 +92,7 @@ jobs:
       packages: write
     steps:
       - name: Download digests
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           pattern: digest-*
           merge-multiple: true
diff --git a/.github/workflows/reusable-kumomta-build.yml b/.github/workflows/reusable-kumomta-build.yml
index 163f6af2..a9292e39 100644
--- a/.github/workflows/reusable-kumomta-build.yml
+++ b/.github/workflows/reusable-kumomta-build.yml
@@ -118,7 +118,7 @@ jobs:
     container: ${{ inputs.base_image }}
     steps:
       - name: "Fetch artifact"
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: "${{ inputs.artifact_name }}"
       - name: Install
@@ -143,7 +143,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: "Fetch artifact"
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: "${{ inputs.artifact_name }}"
       - name: "Upload release"
@@ -163,7 +163,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: "Fetch artifact"
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: "${{ inputs.artifact_name }}"
       - name: "Upload release"
@@ -185,7 +185,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: "Fetch artifact"
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: "${{ inputs.artifact_name }}"
       - name: Set up Docker Buildx