diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index a04c68e..3d68f55 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -285,32 +285,3 @@ jobs:
         run: |
           composer run-script coveralls
           bash <(curl -s https://codecov.io/bash)
-
-  es-sass-linting:
-    name: Scripts and Styles
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-
-      # https://github.com/actions/cache/blob/master/examples.md#macos-and-ubuntu
-      - uses: actions/cache@v2
-        with:
-          path: ~/.npm
-          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-node-
-
-      - uses: actions/setup-node@v1
-        with:
-          node-version: '12'
-
-      - name: Install Node packages
-        run: npm install
-
-      - name: ESLint
-        run: npm run-script eslint
-
-      - name: Sass Lint
-        run: npm run-script sass-lint
diff --git a/.gitignore b/.gitignore
index e106644..3808141 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,4 @@
 
 # WordPress
 /wordpress/
+/wp-content/
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 40ebaf0..2759781 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ This projects adheres to [Semantic Versioning](http://semver.org/) and [Keep a C
 ## [Unreleased][unreleased]
 -
 
+## [4.0.0] - 2022-01-11
+### Changed
+- Updated to https://github.com/pronamic/wp-pay-core/releases/tag/4.0.0.
+- Improved credit card support.
+
 ## [3.0.0] - 2021-08-05
 - Updated to `pronamic/wp-pay-core`  version `3.0.0`.
 - Updated to `pronamic/wp-money`  version `2.0.0`.
@@ -69,8 +74,9 @@ This projects adheres to [Semantic Versioning](http://semver.org/) and [Keep a C
 ## 1.0.0 - 2015-01-19
 - First release.
 
-[unreleased]: https://github.com/wp-pay-gateways/multisafepay/compare/3.0.0...HEAD
-[3.0.0]: https://github.com/wp-pay-gateways/multisafepay/compare/3.0.0...3.0.0
+[unreleased]: https://github.com/wp-pay-gateways/multisafepay/compare/4.0.0...HEAD
+[4.0.0]: https://github.com/wp-pay-gateways/multisafepay/compare/3.0.0...4.0.0
+[3.0.0]: https://github.com/wp-pay-gateways/multisafepay/compare/2.1.3...3.0.0
 [2.1.3]: https://github.com/wp-pay-gateways/multisafepay/compare/2.1.2...2.1.3
 [2.1.2]: https://github.com/wp-pay-gateways/multisafepay/compare/2.1.1...2.1.2
 [2.1.1]: https://github.com/wp-pay-gateways/multisafepay/compare/2.1.0...2.1.1
diff --git a/composer.json b/composer.json
index 60b8a24..a67a569 100644
--- a/composer.json
+++ b/composer.json
@@ -34,7 +34,7 @@
 	"require": {
 		"php": ">=5.6.20",
 		"ext-simplexml": "*",
-		"wp-pay/core": "^3.0"
+		"wp-pay/core": "^4.0"
 	},
 	"require-dev": {
 		"bamarni/composer-bin-plugin": "^1.4",
@@ -44,7 +44,8 @@
 		"phpunit/phpunit": "^5.7 || ^6.0",
 		"pronamic/wp-coding-standards": "^1.0",
 		"roots/wordpress": "^5.8",
-		"wp-phpunit/wp-phpunit": "^5.8"
+		"wp-phpunit/wp-phpunit": "^5.8",
+		"yoast/phpunit-polyfills": "^1.0"
 	},
 	"scripts": {
 		"coveralls": "vendor/bin/php-coveralls -v",
diff --git a/package.json b/package.json
index 58e0a90..5fc62a9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "multisafepay",
-  "version": "3.0.0",
+  "version": "4.0.0",
   "description": "MultiSafepay driver for the WordPress payment processing library.",
   "repository": {
     "type": "git",
diff --git a/src/Client.php b/src/Client.php
index cb721c9..28625e7 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -19,7 +19,7 @@
 /**
  * Title: MultiSafepay Connect client
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/Config.php b/src/Config.php
index 5987d47..5190c95 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -7,7 +7,7 @@
 /**
  * Title: MultiSafepay config
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/Customer.php b/src/Customer.php
index d44237a..09fab41 100644
--- a/src/Customer.php
+++ b/src/Customer.php
@@ -5,7 +5,7 @@
 /**
  * Title: MultiSafepay Connect customer
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/Gateway.php b/src/Gateway.php
index 48099e2..614558b 100644
--- a/src/Gateway.php
+++ b/src/Gateway.php
@@ -14,7 +14,7 @@
 /**
  * Title: MultiSafepay Connect gateway
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
@@ -61,6 +61,7 @@ public function __construct( Config $config ) {
 	 * Get iDEAL issuers
 	 *
 	 * @see Core_Gateway::get_issuers()
+	 * @return array<array<string,array>>
 	 * @since 1.2.0
 	 */
 	public function get_issuers() {
@@ -87,14 +88,17 @@ public function get_issuers() {
 	 * Get credit card issuers
 	 *
 	 * @see Core_Gateway::get_credit_card_issuers()
+	 * @return array<array<string,array>>
 	 */
 	public function get_credit_card_issuers() {
-		$groups[] = array(
-			'options' => array(
-				Methods::AMEX       => _x( 'AMEX', 'Payment method name', 'pronamic_ideal' ),
-				Methods::MAESTRO    => _x( 'Maestro', 'Payment method name', 'pronamic_ideal' ),
-				Methods::MASTERCARD => _x( 'MASTER', 'Payment method name', 'pronamic_ideal' ),
-				Methods::VISA       => _x( 'VISA', 'Payment method name', 'pronamic_ideal' ),
+		// Get active card issuers.
+		$issuers = \array_intersect_key( $this->get_gateways(), Methods::get_cards() );
+
+		sort( $issuers );
+
+		$groups = array(
+			array(
+				'options' => $issuers,
 			),
 		);
 
@@ -105,40 +109,28 @@ public function get_credit_card_issuers() {
 	 * Get payment methods
 	 *
 	 * @see Core_Gateway::get_payment_methods()
+	 * @return array<string>
 	 */
 	public function get_available_payment_methods() {
 		$payment_methods = array();
 
-		// Merchant.
-		$merchant                   = new Merchant();
-		$merchant->account          = $this->config->account_id;
-		$merchant->site_id          = $this->config->site_id;
-		$merchant->site_secure_code = $this->config->site_code;
-
-		// Customer.
-		$customer = new Customer();
-
-		// Get gateways.
-		try {
-			$result = $this->client->get_gateways( $merchant, $customer );
-		} catch ( \Exception $e ) {
-			$error = new \WP_Error( 'multisafepay_error', $e->getMessage() );
-
-			$this->set_error( $error );
-
-			return $payment_methods;
-		}
+		$gateways = $this->get_gateways();
 
-		if ( false === $result ) {
-			return $payment_methods;
-		}
-
-		foreach ( $result as $method => $title ) {
+		foreach ( $gateways as $method => $title ) {
 			$payment_method = Methods::transform_gateway_method( $method );
 
-			if ( $payment_method ) {
-				$payment_methods[] = $payment_method;
+			// Handle cards, as no general method for credit cards is returned by gateway.
+			if ( null === $payment_method && \array_key_exists( $method, Methods::get_cards() ) ) {
+				$payment_method = PaymentMethods::CREDIT_CARD;
 			}
+
+			// Check valid payment method.
+			if ( null === $payment_method ) {
+				continue;
+			}
+
+			// Add available payment method.
+			$payment_methods[] = $payment_method;
 		}
 
 		return $payment_methods;
@@ -148,6 +140,7 @@ public function get_available_payment_methods() {
 	 * Get supported payment methods
 	 *
 	 * @see Core_Gateway::get_supported_payment_methods()
+	 * @return array<string>
 	 */
 	public function get_supported_payment_methods() {
 		return array(
@@ -174,7 +167,7 @@ public function get_supported_payment_methods() {
 	 * @param Payment $payment Payment object.
 	 */
 	public function start( Payment $payment ) {
-		$payment_method = $payment->get_method();
+		$payment_method = $payment->get_payment_method();
 
 		$transaction_description = $payment->get_description();
 
@@ -220,7 +213,7 @@ public function start( Payment $payment ) {
 			case PaymentMethods::IDEAL:
 				$transaction->gateway = Methods::IDEAL;
 
-				$issuer = $payment->get_issuer();
+				$issuer = $payment->get_meta( 'issuer' );
 
 				if ( empty( $issuer ) ) {
 					$message = new RedirectTransactionRequestMessage( $merchant, $customer, $transaction );
@@ -236,7 +229,7 @@ public function start( Payment $payment ) {
 			case PaymentMethods::CREDIT_CARD:
 				$gateway = Methods::transform( $payment_method );
 
-				$issuer = $payment->get_issuer();
+				$issuer = $payment->get_meta( 'issuer' );
 
 				if ( empty( $issuer ) ) {
 					if ( $gateway ) {
@@ -338,4 +331,37 @@ public function update_status( Payment $payment ) {
 		$consumer_bank_details->set_bic( $result->payment_details->account_bic );
 		$consumer_bank_details->set_account_number( $result->payment_details->account_id );
 	}
+
+	/**
+	 * Get gateways.
+	 *
+	 * @return array<string, string>
+	 */
+	private function get_gateways() {
+		// Merchant.
+		$merchant                   = new Merchant();
+		$merchant->account          = $this->config->account_id;
+		$merchant->site_id          = $this->config->site_id;
+		$merchant->site_secure_code = $this->config->site_code;
+
+		// Customer.
+		$customer = new Customer();
+
+		// Get gateways.
+		$gateways = array();
+
+		try {
+			$result = $this->client->get_gateways( $merchant, $customer );
+
+			if ( false !== $result ) {
+				$gateways = $result;
+			}
+		} catch ( \Exception $e ) {
+			$error = new \WP_Error( 'multisafepay_error', $e->getMessage() );
+
+			$this->set_error( $error );
+		}
+
+		return $gateways;
+	}
 }
diff --git a/src/GatewayInfo.php b/src/GatewayInfo.php
index afd3409..96e9554 100644
--- a/src/GatewayInfo.php
+++ b/src/GatewayInfo.php
@@ -5,7 +5,7 @@
 /**
  * Title: MultiSafepay Connect gateway info
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/Integration.php b/src/Integration.php
index 6d5bf29..685bb33 100644
--- a/src/Integration.php
+++ b/src/Integration.php
@@ -7,7 +7,7 @@
 /**
  * Title: MultiSafepay Connect integration
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
@@ -49,10 +49,15 @@ public function __construct( $args = array() ) {
 		}
 	}
 
+	/**
+	 * Get settings fields.
+	 *
+	 * @return array
+	 */
 	public function get_settings_fields() {
 		$fields = array();
 
-		// Account ID
+		// Account ID.
 		$fields[] = array(
 			'section'  => 'general',
 			'filter'   => FILTER_SANITIZE_STRING,
@@ -68,7 +73,7 @@ public function get_settings_fields() {
 			),
 		);
 
-		// Site ID
+		// Site ID.
 		$fields[] = array(
 			'section'  => 'general',
 			'filter'   => FILTER_SANITIZE_STRING,
@@ -84,7 +89,7 @@ public function get_settings_fields() {
 			),
 		);
 
-		// Site Security Code
+		// Site Security Code.
 		$fields[] = array(
 			'section'  => 'general',
 			'filter'   => FILTER_SANITIZE_STRING,
@@ -106,8 +111,7 @@ public function get_settings_fields() {
 	/**
 	 * Get config.
 	 *
-	 * @param $post_id
-	 *
+	 * @param int $post_id Gateway configuration post ID.
 	 * @return Config
 	 */
 	public function get_config( $post_id ) {
diff --git a/src/Merchant.php b/src/Merchant.php
index 114802a..97979a1 100644
--- a/src/Merchant.php
+++ b/src/Merchant.php
@@ -5,7 +5,7 @@
 /**
  * Title: MultiSafepay Connect merchant
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/Methods.php b/src/Methods.php
index f4f5f28..4018293 100644
--- a/src/Methods.php
+++ b/src/Methods.php
@@ -7,7 +7,7 @@
 /**
  * Title: MultiSafepay connect payment methods
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
@@ -127,6 +127,13 @@ class Methods {
 	 */
 	const BANCONTACT = 'MISTERCASH';
 
+	/**
+	 * Gateway Credit card
+	 *
+	 * @var string
+	 */
+	const CREDITCARD = 'CREDITCARD';
+
 	/**
 	 * Gateway Pay after delivery
 	 *
@@ -158,13 +165,14 @@ class Methods {
 	/**
 	 * Payments methods map.
 	 *
-	 * @var array
+	 * @var array<string, string>
 	 */
 	private static $map = array(
 		PaymentMethods::ALIPAY        => self::ALIPAY,
 		PaymentMethods::BANCONTACT    => self::BANCONTACT,
 		PaymentMethods::BANK_TRANSFER => self::BANK_TRANSFER,
 		PaymentMethods::BELFIUS       => self::BELFIUS,
+		PaymentMethods::CREDIT_CARD   => self::CREDITCARD,
 		PaymentMethods::DIRECT_DEBIT  => self::DIRECT_DEBIT,
 		PaymentMethods::GIROPAY       => self::GIROPAY,
 		PaymentMethods::IDEAL         => self::IDEAL,
@@ -179,15 +187,12 @@ class Methods {
 	/**
 	 * Transform WordPress payment method to MultiSafepay method.
 	 *
-	 * @since unreleased
-	 *
-	 * @param string $payment_method Payment method.
-	 * @param mixed  $default        Default payment method.
-	 *
-	 * @return string
+	 * @param string|null $payment_method Payment method.
+	 * @param string|null $default        Default payment method.
+	 * @return string|null
 	 */
 	public static function transform( $payment_method, $default = null ) {
-		if ( ! is_scalar( $payment_method ) ) {
+		if ( ! \is_scalar( $payment_method ) ) {
 			return null;
 		}
 
@@ -201,23 +206,34 @@ public static function transform( $payment_method, $default = null ) {
 	/**
 	 * Transform MultiSafepay method to WordPress payment method.
 	 *
-	 * @since unreleased
-	 *
-	 * @param string $method Mollie method.
-	 *
-	 * @return string
+	 * @param string $method MultiSafepay method.
+	 * @return string|null
 	 */
 	public static function transform_gateway_method( $method ) {
-		if ( ! is_scalar( $method ) ) {
+		if ( ! \is_scalar( $method ) ) {
 			return null;
 		}
 
-		$payment_method = array_search( $method, self::$map, true );
+		$payment_method = \array_search( $method, self::$map, true );
 
-		if ( ! $payment_method ) {
+		if ( ! \is_string( $payment_method ) ) {
 			return null;
 		}
 
 		return $payment_method;
 	}
+
+	/**
+	 * Get cards.
+	 *
+	 * @return array<string, string>
+	 */
+	public static function get_cards() {
+		return array(
+			self::AMEX       => _x( 'American Express', 'Payment method name', 'pronamic_ideal' ),
+			self::MAESTRO    => _x( 'Maestro', 'Payment method name', 'pronamic_ideal' ),
+			self::MASTERCARD => _x( 'Mastercard', 'Payment method name', 'pronamic_ideal' ),
+			self::VISA       => _x( 'Visa', 'Payment method name', 'pronamic_ideal' ),
+		);
+	}
 }
diff --git a/src/MultiSafepay.php b/src/MultiSafepay.php
index c7f43b7..0e94d4f 100644
--- a/src/MultiSafepay.php
+++ b/src/MultiSafepay.php
@@ -5,7 +5,7 @@
 /**
  * Title: MultiSafepay
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/Signature.php b/src/Signature.php
index ae10747..261fd88 100644
--- a/src/Signature.php
+++ b/src/Signature.php
@@ -7,7 +7,7 @@
 /**
  * Title: MultiSafepay Connect signature
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/Statuses.php b/src/Statuses.php
index f7f52c8..693cb5a 100644
--- a/src/Statuses.php
+++ b/src/Statuses.php
@@ -7,7 +7,7 @@
 /**
  * Title: MultiSafepay statuses constants
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/Transaction.php b/src/Transaction.php
index 9945cb4..1bc3fc8 100644
--- a/src/Transaction.php
+++ b/src/Transaction.php
@@ -5,7 +5,7 @@
 /**
  * Title: MultiSafepay Connect transaction
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/WooCommerce.php b/src/WooCommerce.php
index fd86652..1eef070 100644
--- a/src/WooCommerce.php
+++ b/src/WooCommerce.php
@@ -3,7 +3,7 @@
  * WooCommerce.
  *
  * @author    Pronamic <info@pronamic.eu>
- * @copyright 2005-2021 Pronamic
+ * @copyright 2005-2022 Pronamic
  * @license   GPL-3.0-or-later
  * @package   Pronamic\WordPress\Pay
  */
diff --git a/src/XML/DirectTransactionRequestMessage.php b/src/XML/DirectTransactionRequestMessage.php
index 37ac322..b263a4e 100644
--- a/src/XML/DirectTransactionRequestMessage.php
+++ b/src/XML/DirectTransactionRequestMessage.php
@@ -11,7 +11,7 @@
 /**
  * Title: MultiSafepay Connect XML direct transaction request message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/DirectTransactionResponseMessage.php b/src/XML/DirectTransactionResponseMessage.php
index b5a08f2..5e43861 100644
--- a/src/XML/DirectTransactionResponseMessage.php
+++ b/src/XML/DirectTransactionResponseMessage.php
@@ -9,7 +9,7 @@
 /**
  * Title: MultiSafepay Connect XML direct transaction response message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/GatewaysRequestMessage.php b/src/XML/GatewaysRequestMessage.php
index ffc0dfb..17cc500 100644
--- a/src/XML/GatewaysRequestMessage.php
+++ b/src/XML/GatewaysRequestMessage.php
@@ -9,7 +9,7 @@
 /**
  * Title: MultiSafepay Connect XML gateways request message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/GatewaysResponseMessage.php b/src/XML/GatewaysResponseMessage.php
index e0fc247..960de53 100644
--- a/src/XML/GatewaysResponseMessage.php
+++ b/src/XML/GatewaysResponseMessage.php
@@ -8,7 +8,7 @@
 /**
  * Title: MultiSafepay Connect XML gateways response message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/IDealIssuersRequestMessage.php b/src/XML/IDealIssuersRequestMessage.php
index 9f5c533..0308842 100644
--- a/src/XML/IDealIssuersRequestMessage.php
+++ b/src/XML/IDealIssuersRequestMessage.php
@@ -8,7 +8,7 @@
 /**
  * Title: MultiSafepay Connect XML iDEAL issuers request message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/IDealIssuersResponseMessage.php b/src/XML/IDealIssuersResponseMessage.php
index 682a2f1..c05ace6 100644
--- a/src/XML/IDealIssuersResponseMessage.php
+++ b/src/XML/IDealIssuersResponseMessage.php
@@ -8,7 +8,7 @@
 /**
  * Title: MultiSafepay Connect XML iDEAL issuers response message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/Message.php b/src/XML/Message.php
index 91acae9..b09abbf 100644
--- a/src/XML/Message.php
+++ b/src/XML/Message.php
@@ -5,7 +5,7 @@
 /**
  * Title: MultiSafepay Connect XML message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/RedirectTransactionRequestMessage.php b/src/XML/RedirectTransactionRequestMessage.php
index b42d0e1..6454ccb 100644
--- a/src/XML/RedirectTransactionRequestMessage.php
+++ b/src/XML/RedirectTransactionRequestMessage.php
@@ -10,7 +10,7 @@
 /**
  * Title: MultiSafepay Connect XML redirect transaction request message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/RedirectTransactionResponseMessage.php b/src/XML/RedirectTransactionResponseMessage.php
index 53a3389..456fcdf 100644
--- a/src/XML/RedirectTransactionResponseMessage.php
+++ b/src/XML/RedirectTransactionResponseMessage.php
@@ -8,7 +8,7 @@
 /**
  * Title: MultiSafepay Connect XML redirect transaction response message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/RequestMessage.php b/src/XML/RequestMessage.php
index 97786dd..64be8cf 100644
--- a/src/XML/RequestMessage.php
+++ b/src/XML/RequestMessage.php
@@ -10,7 +10,7 @@
 /**
  * Title: MultiSafepay Connect XML request message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/ResponseMessage.php b/src/XML/ResponseMessage.php
index 16c5567..1264569 100644
--- a/src/XML/ResponseMessage.php
+++ b/src/XML/ResponseMessage.php
@@ -5,7 +5,7 @@
 /**
  * Title: MultiSafepay Connect XML response message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/StatusRequestMessage.php b/src/XML/StatusRequestMessage.php
index 1e4459a..78bde8d 100644
--- a/src/XML/StatusRequestMessage.php
+++ b/src/XML/StatusRequestMessage.php
@@ -8,7 +8,7 @@
 /**
  * Title: MultiSafepay Connect XML status request message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/StatusResponseMessage.php b/src/XML/StatusResponseMessage.php
index 5133c57..96e1e1a 100644
--- a/src/XML/StatusResponseMessage.php
+++ b/src/XML/StatusResponseMessage.php
@@ -9,7 +9,7 @@
 /**
  * Title: MultiSafepay Connect XML status response message
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/src/XML/TransactionParser.php b/src/XML/TransactionParser.php
index a399959..723a237 100644
--- a/src/XML/TransactionParser.php
+++ b/src/XML/TransactionParser.php
@@ -9,7 +9,7 @@
 /**
  * Title: MultiSafepay Connect XML transaction parser
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index b054ac2..df1c94d 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -3,7 +3,7 @@
  * Bootstrap tests
  *
  * @author    Pronamic <info@pronamic.eu>
- * @copyright 2005-2021 Pronamic
+ * @copyright 2005-2022 Pronamic
  * @license   GPL-3.0-or-later
  * @package   Pronamic\WordPress\Pay\Gateways\MultiSafepay
  */
diff --git a/tests/phpstan/bootstrap.php b/tests/phpstan/bootstrap.php
index 6fcfb66..cff4f4d 100644
--- a/tests/phpstan/bootstrap.php
+++ b/tests/phpstan/bootstrap.php
@@ -3,7 +3,7 @@
  * Definitions for PHPStan.
  *
  * @author    Pronamic <info@pronamic.eu>
- * @copyright 2005-2021 Pronamic
+ * @copyright 2005-2022 Pronamic
  * @license   GPL-3.0-or-later
  * @package   Pronamic\WordPress\Pay
  */
diff --git a/tests/src/ConfigTest.php b/tests/src/ConfigTest.php
index c8b2627..a6f5b82 100644
--- a/tests/src/ConfigTest.php
+++ b/tests/src/ConfigTest.php
@@ -7,7 +7,7 @@
 /**
  * Title: MultiSafepay - Config test
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author Remco Tolsma
diff --git a/tests/src/GatewayTest.php b/tests/src/GatewayTest.php
index 65d4e2d..fc7b585 100644
--- a/tests/src/GatewayTest.php
+++ b/tests/src/GatewayTest.php
@@ -9,7 +9,7 @@
 /**
  * Title: MultiSafepay gateway test
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/tests/src/StatusesTest.php b/tests/src/StatusesTest.php
index 4ca1382..5976466 100644
--- a/tests/src/StatusesTest.php
+++ b/tests/src/StatusesTest.php
@@ -8,7 +8,7 @@
 /**
  * Title: MultiSafepay statuses test
  * Description:
- * Copyright: 2005-2021 Pronamic
+ * Copyright: 2005-2022 Pronamic
  * Company: Pronamic
  *
  * @author  Remco Tolsma
diff --git a/vendor-bin/phpstan/composer.lock b/vendor-bin/phpstan/composer.lock
index 9a30fb5..c151b94 100644
--- a/vendor-bin/phpstan/composer.lock
+++ b/vendor-bin/phpstan/composer.lock
@@ -9,16 +9,16 @@
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-            "version": "v5.8.0",
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                 "url": "https://github.com/php-stubs/wordpress-stubs.git",
-                "reference": "794e6eedfd5f2a334d581214c007fc398be588fe"
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@@ -47,22 +47,22 @@
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-                "source": "https://github.com/php-stubs/wordpress-stubs/tree/v5.8.0"
+                "source": "https://github.com/php-stubs/wordpress-stubs/tree/v5.8.2"
             },
-            "time": "2021-07-21T02:34:37+00:00"
+            "time": "2021-11-11T13:57:00+00:00"
         },
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-            "version": "0.12.94",
+            "version": "0.12.99",
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-                "reference": "3d0ba4c198a24e3c3fc489f3ec6ac9612c4be5d6"
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-                "reference": "3d0ba4c198a24e3c3fc489f3ec6ac9612c4be5d6",
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@@ -93,7 +93,7 @@
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+                "source": "https://github.com/phpstan/phpstan/tree/0.12.99"
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@@ -113,20 +113,20 @@
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+            "time": "2021-09-12T20:09:55+00:00"
         },
         {
             "name": "symfony/polyfill-php73",
-            "version": "v1.23.0",
+            "version": "v1.24.0",
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                 "url": "https://github.com/symfony/polyfill-php73.git",
-                "reference": "fba8933c384d6476ab14fb7b8526e5287ca7e010"
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@@ -176,7 +176,7 @@
                 "shim"
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-                "source": "https://github.com/symfony/polyfill-php73/tree/v1.23.0"
+                "source": "https://github.com/symfony/polyfill-php73/tree/v1.24.0"
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@@ -192,7 +192,7 @@
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-            "time": "2021-02-19T12:13:01+00:00"
+            "time": "2021-06-05T21:20:04+00:00"
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diff --git a/vendor-bin/psalm/composer.lock b/vendor-bin/psalm/composer.lock
index 77e45f6..cc9e5ae 100644
--- a/vendor-bin/psalm/composer.lock
+++ b/vendor-bin/psalm/composer.lock
@@ -9,16 +9,16 @@
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                 "url": "https://github.com/amphp/amp.git",
-                "reference": "caa95edeb1ca1bf7532e9118ede4a3c3126408cc"
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@@ -86,7 +86,7 @@
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-                "source": "https://github.com/amphp/amp/tree/v2.6.0"
+                "source": "https://github.com/amphp/amp/tree/v2.6.1"
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@@ -94,7 +94,7 @@
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                 }
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-            "time": "2021-07-16T20:06:06+00:00"
+            "time": "2021-09-23T18:43:08+00:00"
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@@ -175,16 +175,16 @@
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             "name": "composer/package-versions-deprecated",
-            "version": "1.11.99.2",
+            "version": "1.11.99.4",
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                 "url": "https://github.com/composer/package-versions-deprecated.git",
-                "reference": "c6522afe5540d5fc46675043d3ed5a45a740b27c"
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-                "reference": "c6522afe5540d5fc46675043d3ed5a45a740b27c",
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@@ -228,7 +228,7 @@
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-                "source": "https://github.com/composer/package-versions-deprecated/tree/1.11.99.2"
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@@ -244,20 +244,91 @@
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-            "time": "2021-05-24T07:46:03+00:00"
+            "time": "2021-09-13T08:41:34+00:00"
+        },
+        {
+            "name": "composer/pcre",
+            "version": "1.0.0",
+            "source": {
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+                "url": "https://github.com/composer/pcre.git",
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+            },
+            "require-dev": {
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+            },
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+            "autoload": {
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+                    "Composer\\Pcre\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            ],
+            "authors": [
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+                    "name": "Jordi Boggiano",
+                    "email": "j.boggiano@seld.be",
+                    "homepage": "http://seld.be"
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+            ],
+            "description": "PCRE wrapping library that offers type-safe preg_* replacements.",
+            "keywords": [
+                "PCRE",
+                "preg",
+                "regex",
+                "regular expression"
+            ],
+            "support": {
+                "issues": "https://github.com/composer/pcre/issues",
+                "source": "https://github.com/composer/pcre/tree/1.0.0"
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+                    "type": "custom"
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+                    "type": "github"
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+            "time": "2021-12-06T15:17:27+00:00"
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         {
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-            "version": "3.2.5",
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@@ -325,29 +396,31 @@
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-                "php": "^5.3.2 || ^7.0 || ^8.0",
+                "composer/pcre": "^1",
+                "php": "^7.2.5 || ^8.0",
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             "require-dev": {
-                "phpstan/phpstan": "^0.12.55",
-                "symfony/phpunit-bridge": "^4.2 || ^5"
+                "phpstan/phpstan": "^1.0",
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@@ -582,16 +655,16 @@
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-            "version": "v4.12.0",
+            "version": "v4.13.2",
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-                "reference": "6608f01670c3cc5079e18c1dab1104e002579143"
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@@ -632,9 +705,9 @@
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-                "source": "https://github.com/nikic/PHP-Parser/tree/v4.12.0"
+                "source": "https://github.com/nikic/PHP-Parser/tree/v4.13.2"
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-            "time": "2021-07-21T10:44:31+00:00"
+            "time": "2021-11-30T19:35:32+00:00"
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@@ -744,16 +817,16 @@
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@@ -764,7 +837,8 @@
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@@ -794,22 +868,22 @@
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+                "reference": "dda05fa913f4dc6eb3386f2f7ce5a45d37a71bcb"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/vimeo/psalm/zipball/00c062267d6e3229d91a1939992987e2d46f2393",
-                "reference": "00c062267d6e3229d91a1939992987e2d46f2393",
+                "url": "https://api.github.com/repos/vimeo/psalm/zipball/dda05fa913f4dc6eb3386f2f7ce5a45d37a71bcb",
+                "reference": "dda05fa913f4dc6eb3386f2f7ce5a45d37a71bcb",
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@@ -1844,8 +1932,9 @@
                 "amphp/byte-stream": "^1.5",
                 "composer/package-versions-deprecated": "^1.8.0",
                 "composer/semver": "^1.4 || ^2.0 || ^3.0",
-                "composer/xdebug-handler": "^1.1 || ^2.0",
+                "composer/xdebug-handler": "^1.1 || ^2.0 || ^3.0",
                 "dnoegel/php-xdg-base-dir": "^0.1.1",
+                "ext-ctype": "*",
                 "ext-dom": "*",
                 "ext-json": "*",
                 "ext-libxml": "*",
@@ -1855,11 +1944,11 @@
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                 "felixfbecker/language-server-protocol": "^1.5",
                 "netresearch/jsonmapper": "^1.0 || ^2.0 || ^3.0 || ^4.0",
-                "nikic/php-parser": "^4.12",
+                "nikic/php-parser": "^4.13",
                 "openlss/lib-array2xml": "^1.0",
                 "php": "^7.1|^8",
                 "sebastian/diff": "^3.0 || ^4.0",
-                "symfony/console": "^3.4.17 || ^4.1.6 || ^5.0",
+                "symfony/console": "^3.4.17 || ^4.1.6 || ^5.0 || ^6.0",
                 "webmozart/path-util": "^2.3"
             },
             "provide": {
@@ -1877,12 +1966,12 @@
                 "psalm/plugin-phpunit": "^0.16",
                 "slevomat/coding-standard": "^7.0",
                 "squizlabs/php_codesniffer": "^3.5",
-                "symfony/process": "^4.3 || ^5.0",
-                "weirdan/phpunit-appveyor-reporter": "^1.0.0",
+                "symfony/process": "^4.3 || ^5.0 || ^6.0",
                 "weirdan/prophecy-shim": "^1.0 || ^2.0"
             },
             "suggest": {
-                "ext-igbinary": "^2.0.5"
+                "ext-curl": "In order to send data to shepherd",
+                "ext-igbinary": "^2.0.5 is required, used to serialize caching data"
             },
             "bin": [
                 "psalm",
@@ -1926,9 +2015,9 @@
             ],
             "support": {
                 "issues": "https://github.com/vimeo/psalm/issues",
-                "source": "https://github.com/vimeo/psalm/tree/4.9.2"
+                "source": "https://github.com/vimeo/psalm/tree/4.18.1"
             },
-            "time": "2021-08-01T01:15:26+00:00"
+            "time": "2022-01-08T21:21:26+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -2036,6 +2125,7 @@
                 "issues": "https://github.com/webmozart/path-util/issues",
                 "source": "https://github.com/webmozart/path-util/tree/2.3.0"
             },
+            "abandoned": "symfony/filesystem",
             "time": "2015-12-17T08:42:14+00:00"
         }
     ],