diff --git a/.github/workflows/build-and-attach-pdf-on-pr.yml b/.github/workflows/build-and-attach-pdf-on-pr.yml
index 6b6c166..31c1c98 100644
--- a/.github/workflows/build-and-attach-pdf-on-pr.yml
+++ b/.github/workflows/build-and-attach-pdf-on-pr.yml
@@ -26,7 +26,7 @@ jobs:
 
       # Node.jsをセットアップ
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version-file: '.node-version'
 
diff --git a/.github/workflows/publish-and-release-pdf.yml b/.github/workflows/publish-and-release-pdf.yml
index a19ffac..1b9174f 100644
--- a/.github/workflows/publish-and-release-pdf.yml
+++ b/.github/workflows/publish-and-release-pdf.yml
@@ -30,7 +30,7 @@ jobs:
 
       # Node.jsをセットアップ
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version-file: '.node-version'