diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..1c0d6e3
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,26 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  composer:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest]
+        php-version: ['8.2', '8.3', '8.4']
+        dependencies: ['lowest', 'highest']
+    name: 'Composer'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          extensions: mbstring, intl
+          coverage: none
+      - name: Composer
+        uses: "ramsey/composer-install@v3"
+        with:
+          dependency-versions: ${{ matrix.dependencies }}