diff --git a/lib/omise/res/OmiseApiResource.php b/lib/omise/res/OmiseApiResource.php
index a6f7148..455c4ca 100644
--- a/lib/omise/res/OmiseApiResource.php
+++ b/lib/omise/res/OmiseApiResource.php
@@ -2,9 +2,7 @@
 
 define('OMISE_PHP_LIB_VERSION', '2.18.0');
 define('OMISE_API_URL', getenv('API_URL') ?: 'https://api.omise.co/');
-define('OMISE_VAULT_URL', getenv('VUALT_URL') ?: 'https://vault.omise.co/');
-echo OMISE_API_URL;
-echo OMISE_VAULT_URL;
+define('OMISE_VAULT_URL', getenv('VAULT_URL') ?: 'https://vault.omise.co/');
 
 #[\AllowDynamicProperties]
 class OmiseApiResource extends OmiseObject