diff --git a/.github/workflows/security-release-gate.yml b/.github/workflows/security-release-gate.yml
index 2f57e6e..f8f4c0e 100644
--- a/.github/workflows/security-release-gate.yml
+++ b/.github/workflows/security-release-gate.yml
@@ -32,7 +32,7 @@ jobs:
       - name: Install Node.js
         uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
-          node-version: '24.19.0'
+          node-version: '24.20.0'
           cache: npm
 
       - name: Use the locked npm release
@@ -50,7 +50,7 @@ jobs:
           sha256sum package.json package-lock.json .github/workflows/*.yml > evidence/source-locks.sha256
           node --version | tee evidence/node-version.txt
           npm --version | tee evidence/npm-version.txt
-          test "$(node --version)" = 'v24.19.0'
+          test "$(node --version)" = 'v24.20.0'
           test "$(npm --version)" = '12.0.2'
 
       - name: Install, test, audit, and build twice
diff --git a/README.md b/README.md
index c690c0b..bab7800 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ The Server currently consumes the immutable `v1.1.17` release artifact. Version
 
 ## Build locally
 
-Requires Node.js 24.19.0 and npm 12.0.2.
+Requires Node.js 24.20.0 LTS and npm 12.0.2.
 
 ```sh
 npm ci --no-audit --no-fund
diff --git a/package-lock.json b/package-lock.json
index 4406913..e9fd5f6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
         "uglify-js": "3.19.3"
       },
       "engines": {
-        "node": "24.19.0"
+        "node": "24.20.0"
       }
     },
     "node_modules/@asamuzakjp/css-color": {
diff --git a/package.json b/package.json
index bd8181c..4df26c1 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
   },
   "packageManager": "npm@12.0.2",
   "engines": {
-    "node": "24.19.0"
+    "node": "24.20.0"
   },
   "scripts": {
     "clean": "bash ./scripts/clean",
diff --git a/scripts/ci b/scripts/ci
index 633b92e..a06f5a3 100644
--- a/scripts/ci
+++ b/scripts/ci
@@ -38,7 +38,7 @@ for (const section of ['dependencies', 'optionalDependencies']) {
 if (pkg.version !== '1.1.18') {
   fail('PACKAGE_RELEASE_VERSION_UNEXPECTED', `actual=${pkg.version}`);
 }
-if (!pkg.engines || pkg.engines.node !== '24.19.0') {
+if (!pkg.engines || pkg.engines.node !== '24.20.0') {
   fail('NODE_ENGINE_UNEXPECTED', `actual=${pkg.engines && pkg.engines.node}`);
 }
 if (pkg.packageManager !== 'npm@12.0.2') {
@@ -54,7 +54,7 @@ if (failures) {
   console.log(`failure_count=${failures}`);
   process.exit(1);
 }
-console.log('API_EXPLORER_PACKAGE_METADATA_OK node=24.19.0 npm=12.0.2 jquery=4.0.0 handlebars=4.7.9 bootstrap_css=5.3.8 bootstrap_icons=1.13.1 sass=1.103.1 jsdom=30.0.1 uglify-js=3.19.3 clean-css=5.3.3');
+console.log('API_EXPLORER_PACKAGE_METADATA_OK node=24.20.0 npm=12.0.2 jquery=4.0.0 handlebars=4.7.9 bootstrap_css=5.3.8 bootstrap_icons=1.13.1 sass=1.103.1 jsdom=30.0.1 uglify-js=3.19.3 clean-css=5.3.3');
 NODE
 
 test "$(node -p "require('bootstrap/package.json').version")" = 5.3.8