diff --git a/.gitignore b/.gitignore
index 4daae38..89ce136 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,7 @@
 /public/assets/
 /assets/vendor/
 ###< symfony/asset-mapper ###
+
+###> phpstan/phpstan ###
+phpstan.neon
+###< phpstan/phpstan ###
diff --git a/composer.json b/composer.json
index 0bc5839..80054f7 100644
--- a/composer.json
+++ b/composer.json
@@ -96,6 +96,8 @@
         }
     },
     "require-dev": {
+        "phpstan/phpstan": "^2.1",
+        "phpstan/phpstan-symfony": "^2.0",
         "phpunit/phpunit": "^9.5",
         "symfony/browser-kit": "7.1.*",
         "symfony/css-selector": "7.1.*",
diff --git a/composer.lock b/composer.lock
index 7ee5a0d..e64689a 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "bfa3fd6c661ba7df71cffe78211433ff",
+    "content-hash": "14aafa03aea05ab652ae5863659345dd",
     "packages": [
         {
             "name": "composer/semver",
@@ -7868,6 +7868,135 @@
             },
             "time": "2022-02-21T01:04:05+00:00"
         },
+        {
+            "name": "phpstan/phpstan",
+            "version": "2.1.22",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpstan/phpstan.git",
+                "reference": "41600c8379eb5aee63e9413fe9e97273e25d57e4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/41600c8379eb5aee63e9413fe9e97273e25d57e4",
+                "reference": "41600c8379eb5aee63e9413fe9e97273e25d57e4",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.4|^8.0"
+            },
+            "conflict": {
+                "phpstan/phpstan-shim": "*"
+            },
+            "bin": [
+                "phpstan",
+                "phpstan.phar"
+            ],
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "PHPStan - PHP Static Analysis Tool",
+            "keywords": [
+                "dev",
+                "static analysis"
+            ],
+            "support": {
+                "docs": "https://phpstan.org/user-guide/getting-started",
+                "forum": "https://github.com/phpstan/phpstan/discussions",
+                "issues": "https://github.com/phpstan/phpstan/issues",
+                "security": "https://github.com/phpstan/phpstan/security/policy",
+                "source": "https://github.com/phpstan/phpstan-src"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/ondrejmirtes",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/phpstan",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-08-04T19:17:37+00:00"
+        },
+        {
+            "name": "phpstan/phpstan-symfony",
+            "version": "2.0.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpstan/phpstan-symfony.git",
+                "reference": "392f7ab8f52a0a776977be4e62535358c28e1b15"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpstan/phpstan-symfony/zipball/392f7ab8f52a0a776977be4e62535358c28e1b15",
+                "reference": "392f7ab8f52a0a776977be4e62535358c28e1b15",
+                "shasum": ""
+            },
+            "require": {
+                "ext-simplexml": "*",
+                "php": "^7.4 || ^8.0",
+                "phpstan/phpstan": "^2.1.13"
+            },
+            "conflict": {
+                "symfony/framework-bundle": "<3.0"
+            },
+            "require-dev": {
+                "php-parallel-lint/php-parallel-lint": "^1.2",
+                "phpstan/phpstan-phpunit": "^2.0",
+                "phpstan/phpstan-strict-rules": "^2.0",
+                "phpunit/phpunit": "^9.6",
+                "psr/container": "1.1.2",
+                "symfony/config": "^5.4 || ^6.1",
+                "symfony/console": "^5.4 || ^6.1",
+                "symfony/dependency-injection": "^5.4 || ^6.1",
+                "symfony/form": "^5.4 || ^6.1",
+                "symfony/framework-bundle": "^5.4 || ^6.1",
+                "symfony/http-foundation": "^5.4 || ^6.1",
+                "symfony/messenger": "^5.4",
+                "symfony/polyfill-php80": "^1.24",
+                "symfony/serializer": "^5.4",
+                "symfony/service-contracts": "^2.2.0"
+            },
+            "type": "phpstan-extension",
+            "extra": {
+                "phpstan": {
+                    "includes": [
+                        "extension.neon",
+                        "rules.neon"
+                    ]
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PHPStan\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Lukáš Unger",
+                    "email": "looky.msc@gmail.com",
+                    "homepage": "https://lookyman.net"
+                }
+            ],
+            "description": "Symfony Framework extensions and rules for PHPStan",
+            "support": {
+                "issues": "https://github.com/phpstan/phpstan-symfony/issues",
+                "source": "https://github.com/phpstan/phpstan-symfony/tree/2.0.7"
+            },
+            "time": "2025-07-22T09:40:57+00:00"
+        },
         {
             "name": "phpunit/php-code-coverage",
             "version": "9.2.32",
diff --git a/phpstan.dist.neon b/phpstan.dist.neon
new file mode 100644
index 0000000..e0de575
--- /dev/null
+++ b/phpstan.dist.neon
@@ -0,0 +1,8 @@
+parameters:
+    level: 6
+    paths:
+        - bin/
+        - config/
+        - public/
+        - src/
+        - tests/
diff --git a/symfony.lock b/symfony.lock
index 246a271..722fa45 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -1,4 +1,13 @@
 {
+    "doctrine/deprecations": {
+        "version": "1.1",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "1.0",
+            "ref": "87424683adc81d7dc305eefec1fced883084aab9"
+        }
+    },
     "doctrine/doctrine-bundle": {
         "version": "2.13",
         "recipe": {
@@ -26,6 +35,18 @@
             "migrations/.gitignore"
         ]
     },
+    "phpstan/phpstan": {
+        "version": "2.1",
+        "recipe": {
+            "repo": "github.com/symfony/recipes-contrib",
+            "branch": "main",
+            "version": "1.0",
+            "ref": "5e490cc197fb6bb1ae22e5abbc531ddc633b6767"
+        },
+        "files": [
+            "phpstan.dist.neon"
+        ]
+    },
     "phpunit/phpunit": {
         "version": "9.6",
         "recipe": {