diff --git a/API/Bill.php b/API/Bill.php
index 3c96237..7185aa0 100644
--- a/API/Bill.php
+++ b/API/Bill.php
@@ -1,22 +1,5 @@
 <?php
 namespace Dfe\Qiwi\API;
-use Df\API\Operation as O;
-use Df\Core\Exception as DFE;
 // 2017-09-03
 /** @method static Bill s() */
-final class Bill extends \Df\API\Facade {
-	/**
-	 * 2017-09-03
-	 * «4.2. Creating an Invoice», page 7.
-	 * «4.2. Выставление счета пользователю», страница 7.
-	 * `[QIWI Wallet] The REST API specification (v.2.12)`, https://mage2.pro/t/3745
-	 * https://github.com/QIWI-API/pull-payments-docs/blob/40d48cf0/_pull-payments-api_en.html.md#request--put
-	 * https://github.com/QIWI-API/pull-payments-docs/blob/40d48cf0/_pull-payments-api_ru.html.md#Запрос--put
-	 * https://developer.qiwi.com/ru/pull-payments/index.html#invoice_rest
-	 * @param string $id
-	 * @param array(string => mixed) $a
-	 * @return O
-	 * @throws DFE
-	 */
-	function put($id, array $a) {return $this->p([$id, $a]);}
-}
\ No newline at end of file
+final class Bill extends \Df\API\Facade {}
\ No newline at end of file
diff --git a/composer.json b/composer.json
index e7d5962..8022ab8 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
 	"name": "mage2pro/qiwi"
-	,"version": "0.1.0"
+	,"version": "0.1.1"
 	,"description": "The «Visa QIWI Wallet» (QIWI Кошелёк) payment extension for Magento 2."
 	,"type": "magento2-module"
 	,"homepage": "https://mage2.pro/c/extensions/qiwi"
@@ -11,7 +11,7 @@
 		"homepage": "https://mage2.pro/users/dmitry_fedyuk",
 		"role": "Developer"
 	}]
-	,"require": {"mage2pro/core": ">=2.11.10"}
+	,"require": {"mage2pro/core": ">=2.11.11"}
 	,"autoload": {"files": ["registration.php"], "psr-4": {"Dfe\\Qiwi\\": ""}}
 	,"keywords": [
 		"API"