diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b8d280..140ca82 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.5.0] - 2025-05-12
+### Added
+- Make billing and shipping address optional for Customer Info
+
 ## [3.4.9] - 2025-04-22
 ### Added
 - Provide `setCustomerCreatedDate` method to set `extra_merchant_data` for the `createPaymentRequest` callback config.
diff --git a/docs/request/customerinfo.md b/docs/request/customerinfo.md
index 4326f09..6d86858 100644
--- a/docs/request/customerinfo.md
+++ b/docs/request/customerinfo.md
@@ -1,7 +1,7 @@
 [<](../index.md) Altapay - PHP Api - Customer Info
 ==================================================
 
-A customer object requries a billing address
+You can optionally supply a billing address when you instantiate a Customer object.
 
 ```php
 $billingAddress = new \Altapay\Request\Address();
@@ -12,7 +12,12 @@ $billingAddress->City = 'City';
 $billingAddress->PostalCode = 'Postal code';
 $billingAddress->Region = 'Region';
 $billingAddress->Country = 'Country';
+
+// 1) With a billing address:
 $customer = new Altapay\Request\Customer($billingAddress);
+
+// 2) Without a billing address:
+$customer = new Altapay\Request\Customer();
 ```
 
 We can also add a shipping address
diff --git a/src/AbstractApi.php b/src/AbstractApi.php
index 24fb8a5..82ac64f 100644
--- a/src/AbstractApi.php
+++ b/src/AbstractApi.php
@@ -55,7 +55,7 @@ abstract class AbstractApi
     /**
      * PHP API version
      */
-    const PHP_API_VERSION = '3.4.9';
+    const PHP_API_VERSION = '3.5.0';
 
     /**
      * Event dispatcher
diff --git a/src/Request/Customer.php b/src/Request/Customer.php
index 48bd7f3..5088d1b 100644
--- a/src/Request/Customer.php
+++ b/src/Request/Customer.php
@@ -125,14 +125,14 @@ class Customer extends AbstractSerializer
     /**
      * Billing address
      *
-     * @var Address
+     * @var Address|null
      */
     private $billing;
 
     /**
      * Shipping address
      *
-     * @var Address
+     * @var Address|null
      */
     private $shipping;
 
@@ -265,9 +265,9 @@ class Customer extends AbstractSerializer
     /**
      * Customer constructor.
      *
-     * @param Address $billingAddress Billing address
+     * @param Address|null $billingAddress Billing address
      */
-    public function __construct(Address $billingAddress)
+    public function __construct(Address $billingAddress = null)
     {
         $this->billing = $billingAddress;
     }
@@ -860,8 +860,13 @@ public function serialize()
             $output['shipping_ref'] = $this->shippingRef;
         }
 
-        $this->setAddress($output, 'billing_', $this->billing);
-        $this->setAddress($output, 'shipping_', $this->shipping);
+        if ($this->billing) {
+            $this->setAddress($output, 'billing_', $this->billing);
+        }
+
+        if ($this->shipping) {
+            $this->setAddress($output, 'shipping_', $this->shipping);
+        }
 
         return $output;
     }