diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 45d6929..0c1020e 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -11,7 +11,7 @@ see [README.md](../README.md). For the full architecture and conventions, see
 
 ## Prerequisites
 
-- [Node.js](https://nodejs.org/) 18 or newer.
+- [Node.js](https://nodejs.org/) 24 or newer (current LTS).
 
 Node is only needed to **build or develop** NetGraph — not to run a built copy.
 The output is plain static files (and a single self-contained HTML file) that
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c645e14..1a138b4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,11 +12,12 @@ permissions:
 jobs:
   build-and-test:
     # Build is OS-independent (Vite + tsc), so a single Linux runner is enough.
-    # The matrix backs up the "Node 18+" support claim in CONTRIBUTING.md.
+    # Pinned to Node 24 (current Active LTS), matching engines and the
+    # CONTRIBUTING support claim.
     strategy:
       fail-fast: false
       matrix:
-        node: [20, 22]
+        node: [24]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
diff --git a/package.json b/package.json
index 2869f91..788bf93 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   ],
   "type": "module",
   "engines": {
-    "node": ">=18"
+    "node": ">=24"
   },
   "scripts": {
     "dev": "vite",