diff --git a/CHANGELOG.md b/CHANGELOG.md
index ce5c899..71d9e3a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
+## [3.1.5]
+- Restore backward compatibility to the gateway version for cardWallet/session and cardWallet/authorize API methods
+
 ## [3.1.4]
 - Added new method to Merchant API `authenticate` 
 
diff --git a/build.gradle b/build.gradle
index f84860a..3e62dee 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,7 +9,7 @@ plugins {
 }
 
 group = 'com.altapay'
-version = '3.1.4'
+version = '3.1.5'
 
 repositories {
     mavenCentral()
diff --git a/readme.md b/readme.md
index 420ba1b..c1744ad 100644
--- a/readme.md
+++ b/readme.md
@@ -49,12 +49,12 @@ For integrating Java projects with the AltaPay gateway.
     <dependency>
         <groupId>com.altapay</groupId>
         <artifactId>sdk-java</artifactId>
-        <version>3.1.4</version>
+        <version>3.1.5</version>
     </dependency>
 
 ### Gradle
 
-    implementation 'com.altapay:sdk-java:3.1.4'
+    implementation 'com.altapay:sdk-java:3.1.5'
 
 ## Changelog
 
diff --git a/src/main/java/com/pensio/api/PensioMerchantAPI.java b/src/main/java/com/pensio/api/PensioMerchantAPI.java
index 0d554cf..5727a6f 100644
--- a/src/main/java/com/pensio/api/PensioMerchantAPI.java
+++ b/src/main/java/com/pensio/api/PensioMerchantAPI.java
@@ -675,7 +675,12 @@ public APIResponse cardWalletSession(CardWalletSessionRequest request) throws Pe
         {
             addParam(params, "applePayRequestData[validationUrl]", request.getApplePayRequestData().getValidationUrl());
             addParam(params, "applePayRequestData[domain]", request.getApplePayRequestData().getDomain());
+
+            // backward compatibility with legacy flow
+            addParam(params, "validationUrl", request.getApplePayRequestData().getValidationUrl());
+            addParam(params, "domain", request.getApplePayRequestData().getDomain());
         }
+
         setPaymentRequestParameters(request, params);
 
         return getAPIResponse("cardWallet/session", HttpMethod.POST, params);
@@ -687,11 +692,11 @@ public APIResponse cardWalletAuthorize(CardWalletAuthorizeRequest request) throw
 		addParam(params, "provider_data", request.getProviderData());
         addParam(params, "payment_id", request.getPaymentId());
 
-        if (!request.getPaymentInfos().getAll().isEmpty()) {
-            for (PaymentInfo paymentInfo : request.getPaymentInfos().getAll()) {
-                addParam(params, "transaction_info[" + paymentInfo.getKey() + "]", paymentInfo.getValue());
-            }
-        }
+        addParam(params, "sale_reconciliation_identifier", request.getSaleReconciliationIdentifier());
+		addParam(params, "sale_invoice_number", request.getSaleInvoiceNumber());
+		addParam(params, "sales_tax", request.getSalesTax());
+
+		setPaymentRequestParameters(request, params);
 
 		return getAPIResponse("cardWallet/authorize", HttpMethod.POST, params);
 	}
diff --git a/src/main/java/com/pensio/api/request/CardWalletAuthorizeRequest.java b/src/main/java/com/pensio/api/request/CardWalletAuthorizeRequest.java
index e815639..8f6a21c 100644
--- a/src/main/java/com/pensio/api/request/CardWalletAuthorizeRequest.java
+++ b/src/main/java/com/pensio/api/request/CardWalletAuthorizeRequest.java
@@ -1,18 +1,21 @@
 package com.pensio.api.request;
 
-public class CardWalletAuthorizeRequest {
+import com.pensio.Amount;
+
+public class CardWalletAuthorizeRequest extends PaymentRequest<CardWalletAuthorizeRequest> {
 
-    private String paymentId;
     private String providerData;
-    private final PaymentInfos paymentInfos = new PaymentInfos();
+    private String paymentId;
 
-    public PaymentInfos getPaymentInfos() {
-        return paymentInfos;
-    }
+    // Optional parameters -- deprecated as others payment request attributes (reusing existing payment by payment_id)
+    private String saleReconciliationIdentifier;
+    private String saleInvoiceNumber;
+    private String salesTax;
 
-    public CardWalletAuthorizeRequest addPaymentInfo(String key, String value) {
-        paymentInfos.add(key, value);
-        return this;
+    public CardWalletAuthorizeRequest(String providerData, String paymentId, String terminal, String shopOrderId, Amount amount) {
+        super(shopOrderId, terminal, amount);
+        this.providerData = providerData;
+        this.paymentId = paymentId;
     }
 
     public String getProviderData() {
@@ -33,4 +36,31 @@ public CardWalletAuthorizeRequest setPaymentId(String paymentId) {
         return this;
     }
 
+    public String getSaleReconciliationIdentifier() {
+        return saleReconciliationIdentifier;
+    }
+
+    public CardWalletAuthorizeRequest setSaleReconciliationIdentifier(String saleReconciliationIdentifier) {
+        this.saleReconciliationIdentifier = saleReconciliationIdentifier;
+        return this;
+    }
+
+    public String getSaleInvoiceNumber() {
+        return saleInvoiceNumber;
+    }
+
+    public CardWalletAuthorizeRequest setSaleInvoiceNumber(String saleInvoiceNumber) {
+        this.saleInvoiceNumber = saleInvoiceNumber;
+        return this;
+    }
+
+    public String getSalesTax() {
+        return salesTax;
+    }
+
+    public CardWalletAuthorizeRequest setSalesTax(String salesTax) {
+        this.salesTax = salesTax;
+        return this;
+    }
+
 }