diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..ac46147
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build and typecheck
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v7
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v7
+        with:
+          # Matches opsimate-docs/dockerfile. Docusaurus 3.10 requires >=20,
+          # so this must stay on a supported LTS line.
+          node-version: '24'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Typecheck
+        working-directory: ./opsimate-docs
+        run: npm run typecheck
+
+      - name: Build
+        run: npm run build
diff --git a/.github/workflows/link-check.yml b/.github/workflows/link-check.yml
index 6f34fdf..4787d37 100644
--- a/.github/workflows/link-check.yml
+++ b/.github/workflows/link-check.yml
@@ -28,7 +28,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v7
         with:
-          node-version: '18'
+          node-version: '24'
           cache: 'npm'
           cache-dependency-path: 'opsimate-docs/package-lock.json'
 
diff --git a/opsimate-docs/package.json b/opsimate-docs/package.json
index af79e6a..92952d1 100644
--- a/opsimate-docs/package.json
+++ b/opsimate-docs/package.json
@@ -46,6 +46,6 @@
     ]
   },
   "engines": {
-    "node": ">=18.0"
+    "node": ">=20.0"
   }
 }