diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..6226a44
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,29 @@
+name: CI
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        node-version: [18, 20]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v3
+        with:
+          version: 8.15.4
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: "pnpm"
+      - run: pnpm i --frozen-lockfile -P
+
+      - run: pnpm run test:demo
diff --git a/package.json b/package.json
index 4b05bc2..00b01e2 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   "types": "./index.d.ts",
   "scripts": {
     "pub": "release-it",
-    "test:demo": "cd demo/react && npm run sizecheck"
+    "test:demo": "cd demo/react && pnpm i && pnpm run sizecheck"
   },
   "dependencies": {
     "cac": "^6.7.14",