diff --git a/Charge.php b/Charge.php
index d75de3f..867b6d3 100644
--- a/Charge.php
+++ b/Charge.php
@@ -7,13 +7,13 @@
  */
 final class Charge extends \Df\PaypalClone\Charge {
 	/**
-	 * 2017-04-13
+	 * 2017-08-19
 	 * @override
-	 * @see \Df\PaypalClone\Charge::pCharge()
+	 * @see \Df\PaypalClone\Charge::k_MerchantId()
 	 * @used-by \Df\PaypalClone\Charge::p()
-	 * @return array(string => mixed)
+	 * @return string
 	 */
-	protected function pCharge() {$s = $this->s(); return [];}
+	protected function k_MerchantId() {return '';}
 
 	/**
 	 * 2017-04-13
@@ -32,4 +32,13 @@ protected function k_RequestId() {return '';}
 	 * @return string
 	 */
 	protected function k_Signature() {return '';}
+
+	/**
+	 * 2017-04-13
+	 * @override
+	 * @see \Df\PaypalClone\Charge::pCharge()
+	 * @used-by \Df\PaypalClone\Charge::p()
+	 * @return array(string => mixed)
+	 */
+	protected function pCharge() {$s = $this->s(); return [];}
 }
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 86cdcd0..f4d07c0 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
 	"name": "mage2pro/yandex-kassa"
-	,"version": "0.0.2"
+	,"version": "0.0.3"
 	,"description": "The «Yandex.Kassa» (Яндекс.Касса, Yandex.Checkout) payment extension for Magento 2."
 	,"type": "magento2-module"
 	,"homepage": "https://mage2.pro/c/extensions/yandex-kassa"
@@ -11,7 +11,7 @@
 		"homepage": "https://mage2.pro/users/dmitry_fedyuk",
 		"role": "Developer"
 	}]
-	,"require": {"mage2pro/core": ">=2.4.53"}
+	,"require": {"mage2pro/core": ">=2.10.32"}
 	,"autoload": {"files": ["registration.php"], "psr-4": {"Dfe\\YandexKassa\\": ""}}
 	,"keywords": [
 		"API"
diff --git a/etc/adminhtml/system.xml b/etc/adminhtml/system.xml
index cfff51b..f526619 100644
--- a/etc/adminhtml/system.xml
+++ b/etc/adminhtml/system.xml
@@ -65,7 +65,7 @@
 					<depends><field id='enable'>1</field></depends>
 				</field>
 				<field
-					id='testPublicKey'
+					id='testMerchantID'
 					translate='label'
 					type='text'
 					sortOrder='4'
@@ -100,7 +100,7 @@
 					<validate>required-entry</validate>
 				</field>
 				<field
-					id='livePublicKey'
+					id='liveMerchantID'
 					translate='label'
 					type='text'
 					sortOrder='6'