diff --git a/Classes/Configuration.php b/Classes/Configuration.php
index 0b03499..591cfe0 100644
--- a/Classes/Configuration.php
+++ b/Classes/Configuration.php
@@ -86,6 +86,6 @@ public function hasSkipHeaderValidation(): bool
         if (strlen($validationName) < 30) {
             return false;
         }
-        return $request && $request->hasHeader('X-FriendlyCaptcha-Skip-Validation') && in_array($validationName, $request->getHeader('X-FriendlyCaptcha-Skip-Validation'), truex);
+        return $request && $request->hasHeader('X-FriendlyCaptcha-Skip-Validation') && in_array($validationName, $request->getHeader('X-FriendlyCaptcha-Skip-Validation'), true);
     }
 }