diff --git a/composer.json b/composer.json
index 6dce887..3ad0e1d 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
     "require": {
         "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
         "ext-json": "*",
-        "codeception/codeception": "^4.0",
+        "codeception/codeception": "^5.0",
         "guzzlehttp/guzzle": "^6.1 || ^7.0"
     },
     "require-dev": {
diff --git a/src/Mailpit.php b/src/Mailpit.php
index f0c3d00..c515cf7 100644
--- a/src/Mailpit.php
+++ b/src/Mailpit.php
@@ -13,10 +13,8 @@ class Mailpit extends Module
 
     /**
      * Codeception exposed variables.
-     *
-     * @var array<string>
      */
-    protected $config = [
+    protected array $config = [
         'url',
         'port',
         'guzzleRequestOptions',
@@ -26,10 +24,8 @@ class Mailpit extends Module
 
     /**
      * Codeception required variables.
-     *
-     * @var array<string>
      */
-    protected $requiredFields = ['url', 'port'];
+    protected array $requiredFields = ['url', 'port'];
 
     /**
      * HTTP Client to interact with Mailpit.