diff --git a/README.md b/README.md
index f3b1702..4dc6f2a 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ The package's installation is done using composer. Simply add these lines to you
 ```json
 {
     "require": {
-        "processout/processout-php": "^6.23.0"
+        "processout/processout-php": "^6.24.0"
     }
 }
 ```
diff --git a/src/Invoice.php b/src/Invoice.php
index 85faa20..bbb58dc 100755
--- a/src/Invoice.php
+++ b/src/Invoice.php
@@ -1528,6 +1528,7 @@ public function authorize($source, $options = array())
             "retry_drop_liability_shift" => (!empty($options["retry_drop_liability_shift"])) ? $options["retry_drop_liability_shift"] : null, 
             "capture_amount" => (!empty($options["capture_amount"])) ? $options["capture_amount"] : null, 
             "enable_three_d_s_2" => (!empty($options["enable_three_d_s_2"])) ? $options["enable_three_d_s_2"] : null, 
+            "allow_fallback_to_sale" => (!empty($options["allow_fallback_to_sale"])) ? $options["allow_fallback_to_sale"] : null, 
             "auto_capture_at" => (!empty($options["auto_capture_at"])) ? $options["auto_capture_at"] : null, 
             "metadata" => (!empty($options["metadata"])) ? $options["metadata"] : null, 
             "source" => $source
diff --git a/src/Networking/Request.php b/src/Networking/Request.php
index 270d93f..7cffc62 100644
--- a/src/Networking/Request.php
+++ b/src/Networking/Request.php
@@ -31,7 +31,7 @@ protected function prepare($options, $len = null)
         $headers = array(
             'API-Version: 1.4.0.0',
             'Content-Type: application/json',
-            'User-Agent: ProcessOut PHP-Bindings/6.23.0'
+            'User-Agent: ProcessOut PHP-Bindings/6.24.0'
         );
         if (! empty($options['idempotencyKey']))
             $headers[] = 'Idempotency-Key: ' . $options['idempotencyKey'];