diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
new file mode 100644
index 0000000..8b7463a
--- /dev/null
+++ b/.github/workflows/phpstan.yml
@@ -0,0 +1,21 @@
+name: PHPStan
+
+on: [push, pull_request]
+
+jobs:
+  phpstan:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@2.26.0
+        with:
+          php-version: '8.0'
+
+      - name: Install composer dependencies
+        uses: ramsey/composer-install@v2
+
+      - name: Run PHPStan
+        run: vendor/bin/phpstan --error-format=github
diff --git a/README.md b/README.md
index d67a58c..e72d98d 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Telegram Git Notifier
 
-This package provides the ability to integrate the Telegram messaging service and GitHub/GitLab.
+This package provides the ability to integrate the Telegram messaging service and GitHub and GitLab.
 With this package,
 you can create a Telegram bot to receive notifications from GitHub or GitLab events
 and manage customization through messages and buttons on Telegram.
diff --git a/composer.json b/composer.json
index 3de2514..b590016 100644
--- a/composer.json
+++ b/composer.json
@@ -33,6 +33,11 @@
       "common/helpers.php"
     ]
   },
+  "autoload-dev": {
+    "psr-4": {
+      "LbilTech\\TelegramGitNotifier\\Tests\\": "tests"
+    }
+  },
   "require": {
     "php": "^8.0",
     "eleirbag89/telegrambotphp": "^1.4",
@@ -40,6 +45,9 @@
     "symfony/http-foundation": "^6.3",
     "vlucas/phpdotenv": "^5.5"
   },
+  "require-dev": {
+    "phpstan/phpstan": "^1.10.39"
+  },
   "support": {
     "issues": "https://github.com/lbiltech/telegram-git-notifier/issues"
   },
diff --git a/src/Exceptions/TelegramGitNotifierException.php b/src/Exceptions/TelegramGitNotifierException.php
index e9e0337..3d201ea 100644
--- a/src/Exceptions/TelegramGitNotifierException.php
+++ b/src/Exceptions/TelegramGitNotifierException.php
@@ -8,11 +8,11 @@ class TelegramGitNotifierException extends Exception
 {
     public static function isEmpty(): self
     {
-        return new static('Telegram Git Notifier is empty');
+        return new self('Telegram Git Notifier is empty');
     }
 
     public static function invalid(): self
     {
-        return new static('Telegram Git Notifier is invalid');
+        return new self('Telegram Git Notifier is invalid');
     }
 }