diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..3c2d486
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18, 20]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: npm
+
+      - run: npm ci
+
+      - name: Run tests
+        run: npm test
+        env:
+          NODE_ENV: test
+          JWT_SECRET: ci-test-jwt-secret-not-real
+          SESSION_SECRET: ci-test-session-secret-not-real
+          ADMIN_USERNAME: ci-test-admin
+          ADMIN_PASSWORD: ci-test-password
+          ALLOWED_ORIGINS: http://localhost:3000