diff --git a/src/Exchange/Asset.php b/src/Exchange/Asset.php
index <HASH>..<HASH> 100644
--- a/src/Exchange/Asset.php
+++ b/src/Exchange/Asset.php
@@ -205,5 +205,27 @@ class Asset extends \CFX\JsonApi\AbstractResource implements AssetInterface {
         return $this->_setAttribute($field, $val);

     }

 

+

+

+    /**

+     * Serialize issuanceCloseDate field to a value that SQL understands

+     *

+     * We have to do this here because when order intents are serialized that already have a issuanceCloseDate date

+     * set, they end up sending malformed data to the API. This is because \DateTime actually does implement

+     * jsonSerialize, but in a way that breaks our implementation.

+     */

+    public function serializeAttribute($name)

+    {

+        if ($name === 'issuanceCloseDate') {

+            $val = $this->getIssuanceCloseDate();

+            if ($val instanceof \DateTimeInterface) {

+                $val = $val->format(\DateTime::RFC3339);

+            }

+            return (string)$val;

+        }

+        return parent::serializeAttribute($name);

+    }

+

+

 }
Added proper serialization to issuancecloseDate on assets