diff --git a/src/Factories/IdealPostcodesFactory.php b/src/Factories/IdealPostcodesFactory.php
index 3e85fe6..7122483 100644
--- a/src/Factories/IdealPostcodesFactory.php
+++ b/src/Factories/IdealPostcodesFactory.php
@@ -21,6 +21,6 @@ public static function getByEnvironment()
             throw new Exception('Environment variable '.$envKey.' is not found or is empty.');
         }
 
-        self::getByAPIKey();
+        self::getByAPIKey($apiKey);
     }
 }
\ No newline at end of file