diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 35c5266..7d5e13d 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -8,16 +8,20 @@ on:
 
 jobs:
   phpstan:
+    name: Static Code Analysis
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        variants: [{ php: 7.4 }, { php: 8.2 }, { php: 8.4 } ]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install dependencies
         uses: php-actions/composer@v6
         with:
           command: update
-          php_version: "7.4"
+          php_version: ${{ matrix.variants.php }}
 
       - name: PHPStan Static Analysis
         uses: php-actions/phpstan@v3
diff --git a/composer.json b/composer.json
index 590b3f9..0ae4bf5 100644
--- a/composer.json
+++ b/composer.json
@@ -11,6 +11,7 @@
         "php": ">=7.4"
     },
     "require-dev": {
+        "phpstan/phpstan": "^1.12",
         "phpunit/phpunit": "~9.6"
     },
     "autoload": {