diff --git a/.github/workflows/jest.yml b/.github/workflows/jest.yml
index 1b416fd..01352bb 100644
--- a/.github/workflows/jest.yml
+++ b/.github/workflows/jest.yml
@@ -32,9 +32,9 @@ jobs:
       - uses: actions/checkout@v6
         # https://github.com/actions/setup-node/
       - name: Set up pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@v5
         with:
-          version: 9
+          version: 10
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
diff --git a/.node-version b/.node-version
index d7fd7cd..d9b0424 100644
--- a/.node-version
+++ b/.node-version
@@ -1 +1 @@
-v25.8.2
+v25.9.0
diff --git a/SECURITY.md b/SECURITY.md
index abce52b..ebf2a12 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -10,7 +10,7 @@
 | OS baseline          | WSL (Ubuntu 25.10)                 | Shared environment across tracks.                                               |
 | Ruby exercises       | Ruby 4.0.2 (`.ruby-version`)       | Bundler-managed gems per kata; default relies on stdlib.                        |
 | Python exercises     | CPython 3.14.3 (`.python-version`) | Requirements are declared per exercise; base templates use stdlib only.         |
-| JavaScript exercises | Node v25.8.1 (`.node-version`)     | Use the Node toolchain plus any dependencies listed inside each `package.json`. |
+| JavaScript exercises | Node v25.9.0 (`.node-version`)     | Use the Node toolchain plus any dependencies listed inside each `package.json`. |
 
 ## Backward Compatibility
 
diff --git a/javascript/README.md b/javascript/README.md
index fd491f9..2292750 100644
--- a/javascript/README.md
+++ b/javascript/README.md
@@ -1,6 +1,6 @@
 ## 1. Environment
 
-- Node v25.8.1
+- Node v25.9.0
 - PNPM 10.30.3
 
 ## 2. JEST install for Unit Test