diff --git a/bin/console b/bin/console
index bb15cc1..172e0e7 100644
--- a/bin/console
+++ b/bin/console
@@ -19,9 +19,9 @@ if (file_exists(__DIR__.'/../.env')) {
 }
 
 $app = new Application();
-$app->add(new FetchContributorsCommand());
-$app->add(new FetchPullRequestsMergedCommand());
-$app->add(new FetchRepositoriesCommand());
-$app->add(new GenerateNewContributorsCommand());
-$app->add(new GenerateTopCompaniesCommand());
+$app->addCommand(new FetchContributorsCommand());
+$app->addCommand(new FetchPullRequestsMergedCommand());
+$app->addCommand(new FetchRepositoriesCommand());
+$app->addCommand(new GenerateNewContributorsCommand());
+$app->addCommand(new GenerateTopCompaniesCommand());
 $app->run();
diff --git a/composer.json b/composer.json
index d076cb8..3e4c2a2 100644
--- a/composer.json
+++ b/composer.json
@@ -34,6 +34,7 @@
         }
     },
     "require-dev": {
-        "phpstan/phpstan": "^2.1"
+        "phpstan/phpstan": "^2.1",
+        "phpstan/phpstan-symfony": "^2.0"
     }
 }
diff --git a/composer.lock b/composer.lock
index e8306ad..ccaed60 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": "12d0eedfd69c3bf936458178fa5943d1",
+    "content-hash": "90f479e7a2f6d5649ecc0134cac45882",
     "packages": [
         {
             "name": "cache/adapter-common",
@@ -2580,19 +2580,90 @@
                 }
             ],
             "time": "2025-12-05T10:24:31+00:00"
+        },
+        {
+            "name": "phpstan/phpstan-symfony",
+            "version": "2.0.10",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpstan/phpstan-symfony.git",
+                "reference": "5a7ab5319a0b0d856ddbe08f67a21b00b386107f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpstan/phpstan-symfony/zipball/5a7ab5319a0b0d856ddbe08f67a21b00b386107f",
+                "reference": "5a7ab5319a0b0d856ddbe08f67a21b00b386107f",
+                "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": "^2.0.8",
+                "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/2.0.10"
+            },
+            "time": "2026-01-20T16:40:28+00:00"
         }
     ],
     "aliases": [],
     "minimum-stability": "stable",
-    "stability-flags": {},
+    "stability-flags": [],
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
         "ext-json": "*"
     },
-    "platform-dev": {},
+    "platform-dev": [],
     "platform-overrides": {
         "php": "8.4.0"
     },
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.2.0"
 }
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 7f88e86..01f44a2 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -12,4 +12,7 @@ parameters:
     -
       identifier: missingType.iterableValue
       path: src/Service/Github.php
-      count: 3
\ No newline at end of file
+      count: 3
+includes:
+    - vendor/phpstan/phpstan-symfony/extension.neon
+    - vendor/phpstan/phpstan-symfony/rules.neon
diff --git a/src/Command/FetchContributorsCommand.php b/src/Command/FetchContributorsCommand.php
index cf34882..5b37ed5 100644
--- a/src/Command/FetchContributorsCommand.php
+++ b/src/Command/FetchContributorsCommand.php
@@ -23,7 +23,7 @@ protected function configure(): void
                 null,
                 InputOption::VALUE_OPTIONAL,
                 '',
-                $_ENV['GH_TOKEN'] ?? null
+                isset($_ENV['GH_TOKEN']) ? (string) $_ENV['GH_TOKEN'] : null
             )
             ->addOption('repository', 'r', InputOption::VALUE_OPTIONAL, 'GitHub repository')
             ->addOption('config', 'c', InputOption::VALUE_OPTIONAL, '', 'config.dist.yml')
diff --git a/src/Command/FetchPullRequestsMergedCommand.php b/src/Command/FetchPullRequestsMergedCommand.php
index 2020aa6..6117878 100644
--- a/src/Command/FetchPullRequestsMergedCommand.php
+++ b/src/Command/FetchPullRequestsMergedCommand.php
@@ -22,7 +22,7 @@ protected function configure(): void
                 null,
                 InputOption::VALUE_OPTIONAL,
                 '',
-                $_ENV['GH_TOKEN'] ?? null
+                isset($_ENV['GH_TOKEN']) ? (string) $_ENV['GH_TOKEN'] : null
             );
     }
 
diff --git a/src/Command/FetchRepositoriesCommand.php b/src/Command/FetchRepositoriesCommand.php
index 532ac8e..59a1fa2 100644
--- a/src/Command/FetchRepositoriesCommand.php
+++ b/src/Command/FetchRepositoriesCommand.php
@@ -17,7 +17,7 @@ protected function configure(): void
                 null,
                 InputOption::VALUE_OPTIONAL,
                 '',
-                $_ENV['GH_TOKEN'] ?? null
+                isset($_ENV['GH_TOKEN']) ? (string) $_ENV['GH_TOKEN'] : null
             )
             ->addOption('config', 'c', InputOption::VALUE_OPTIONAL, '', 'config.dist.yml')
         ;
diff --git a/src/Command/GenerateTopCompaniesCommand.php b/src/Command/GenerateTopCompaniesCommand.php
index a9819e6..452127a 100644
--- a/src/Command/GenerateTopCompaniesCommand.php
+++ b/src/Command/GenerateTopCompaniesCommand.php
@@ -47,7 +47,7 @@ protected function configure(): void
                 null,
                 InputOption::VALUE_OPTIONAL,
                 '',
-                $_ENV['GH_TOKEN'] ?? null
+                isset($_ENV['GH_TOKEN']) ? (string) $_ENV['GH_TOKEN'] : null
             )
             ->addOption('config', 'c', InputOption::VALUE_OPTIONAL, '', 'config.dist.yml');
     }