diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ec3c30797..72e205630 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,6 +19,10 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.ref }}
           repository: ${{ github.event.pull_request.head.repo.full_name }}
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24.x
       - name: Install dependencies
         run: yarn install --check-files
       - name: build
@@ -90,7 +94,7 @@ jobs:
     steps:
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
+          node-version: 24.x
       - name: Download build artifacts
         uses: actions/download-artifact@v4
         with:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 96343481e..372ad744f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -25,6 +25,10 @@ jobs:
         run: |-
           git config user.name "github-actions"
           git config user.email "github-actions@github.com"
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24.x
       - name: Install dependencies
         run: yarn install --check-files --frozen-lockfile
       - name: release
@@ -63,7 +67,7 @@ jobs:
     steps:
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
+          node-version: 24.x
       - name: Download build artifacts
         uses: actions/download-artifact@v4
         with:
@@ -93,7 +97,7 @@ jobs:
     steps:
       - uses: actions/setup-node@v4
         with:
-          node-version: 18.x
+          node-version: 24.x
       - name: Download build artifacts
         uses: actions/download-artifact@v4
         with:
diff --git a/.github/workflows/upgrade-main.yml b/.github/workflows/upgrade-main.yml
index 1e62f1d2a..ef1870061 100644
--- a/.github/workflows/upgrade-main.yml
+++ b/.github/workflows/upgrade-main.yml
@@ -18,6 +18,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           ref: main
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24.x
       - name: Install dependencies
         run: yarn install --check-files --frozen-lockfile
       - name: Upgrade dependencies
diff --git a/.projenrc.ts b/.projenrc.ts
index 10eff3193..70682ea18 100644
--- a/.projenrc.ts
+++ b/.projenrc.ts
@@ -13,6 +13,7 @@ const project = new cdk.JsiiProject({
   devDeps: ['fs-extra', '@types/fs-extra', 'glob'],
   jsiiVersion: '5.2.x',
   typescriptVersion: '5.2.x',
+  workflowNodeVersion: '24.x',
 
   autoApproveUpgrades: true,
   autoApproveOptions: { allowedUsernames: ['cdklabs-automation'] },
diff --git a/src/model/actions-metadata-model.ts b/src/model/actions-metadata-model.ts
index b61a6466f..b765b713b 100644
--- a/src/model/actions-metadata-model.ts
+++ b/src/model/actions-metadata-model.ts
@@ -129,6 +129,11 @@ export enum RunsUsing {
    */
   NODE_20 = 'node20',
 
+  /**
+   * "node24"
+   */
+  NODE_24 = 'node24',
+
   /**
    * "composite"
    */
@@ -151,6 +156,7 @@ interface Runs {
    * - use `RunsUsing.NODE_12` for Node.js v12.
    * - use `RunsUsing.NODE_16` for Node.js v16.
    * - use `RunsUsing.NODE_20` for Node.js v20.
+   * - use `RunsUsing.NODE_24` for Node.js v24.
    *
    * For composite actions:
    * - use `RunsUsing.COMPOSITE`
diff --git a/test/action.test.ts b/test/action.test.ts
index 01e7d125e..896a7b901 100644
--- a/test/action.test.ts
+++ b/test/action.test.ts
@@ -21,7 +21,7 @@ describe('GitHubActionTypeScriptProject', () => {
       defaultReleaseBranch: 'main',
       actionMetadata: {
         runs: {
-          using: RunsUsing.NODE_12,
+          using: RunsUsing.NODE_24,
           main: 'dist/index.js',
         },
         inputs: {
@@ -39,7 +39,7 @@ describe('GitHubActionTypeScriptProject', () => {
 
     const workflow = synthSnapshot(project)['action.yml'];
     expect(workflow).toContain(
-      'runs:\n  using: node12\n  main: dist/index.js',
+      'runs:\n  using: node24\n  main: dist/index.js',
     );
     expect(workflow).toContain(
       'inputs:\n  input1:\n    description: my first input',