diff --git a/app/Services/AIPrompt/OpenAPIPrompt.php b/app/Services/AIPrompt/OpenAPIPrompt.php
index 0142043..4705ddc 100644
--- a/app/Services/AIPrompt/OpenAPIPrompt.php
+++ b/app/Services/AIPrompt/OpenAPIPrompt.php
@@ -12,7 +12,7 @@ class OpenAPIPrompt implements IAIPrompt
     private string $host;
     private ?string $token = null;
 
-    public function __construct(string $host = null) {
+    public function __construct(?string $host = null) {
         $this->host = $host ?? config('llm.api.host');
         if (config('llm.api.token')) {
             $this->token = config('llm.api.token');