diff --git a/config/services.php b/config/services.php
index d93fe6f..8e52b78 100644
--- a/config/services.php
+++ b/config/services.php
@@ -58,9 +58,9 @@ return [
         'query_order_url' => env('KBZ_QUERY_ORDER_URL'),
         'refund_order_url' => env('KBZ_REFUND_ORDER_URL'),
         'notify_url' => env('KBZ_NOTIFY_URL'),
-        'cert_path' => env('KBZ_CERT_PATH'),
-        'cert_key_path' => env('KBZ_CERT_KEY_PATH'),
-        'ca_path' => env('KBZ_CA_PATH'),
+        'cert_path' => env('KBZ_CERT_PATH') ? storage_path(env('KBZ_CERT_PATH')) : null,
+        'cert_key_path' => env('KBZ_CERT_KEY_PATH') ? storage_path(env('KBZ_CERT_KEY_PATH')) : null,
+        'ca_path' => env('KBZ_CA_PATH') ? storage_path(env('KBZ_CA_PATH')) : null,
         'cert_password' => env('KBZ_CERT_PASSWORD'),
     ],