diff --git a/composer.json b/composer.json
index 9aa9f51..553fd6e 100755
--- a/composer.json
+++ b/composer.json
@@ -11,12 +11,12 @@
     "license": "MIT",
     "require": {
         "php": "^8.2",
-        "livewire/livewire": "^3.0"
+        "livewire/livewire": "^3.0|^4.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.8",
-        "larastan/larastan": "^2.9",
-        "orchestra/testbench": "^9.0",
+        "larastan/larastan": "^2.9|^3.0",
+        "orchestra/testbench": "^9.0|^10.0",
         "phpunit/phpunit": "^11.1"
     },
     "autoload": {
diff --git a/src/LivewireRecaptcha.php b/src/LivewireRecaptcha.php
index de203cc..55d0907 100644
--- a/src/LivewireRecaptcha.php
+++ b/src/LivewireRecaptcha.php
@@ -15,10 +15,10 @@ class LivewireRecaptcha
      * @return string
      */
     public static function directive(
-        string $version = null,
-        string $siteKey = null,
-        string $theme = null,
-        string $size = null,
+        ?string $version = null,
+        ?string $siteKey = null,
+        ?string $theme = null,
+        ?string $size = null,
     ): string {
         $version ??= config('services.google.recaptcha.version') ?? 'v3';