diff --git a/src/LaravelScrapingBee.php b/src/LaravelScrapingBee.php
index ae5a8d1..cce7f8d 100644
--- a/src/LaravelScrapingBee.php
+++ b/src/LaravelScrapingBee.php
@@ -346,7 +346,7 @@ public function addParams(array $params): self
     public function setHeaders(array $headers): self
     {
         $this->headers = array_combine(
-            array_map(fn($key) => 'Spb-'. $key, array_keys($headers)),
+            array_map(fn ($key) => 'Spb-'. $key, array_keys($headers)),
             $headers
         );