diff --git a/src/Payload.php b/src/Payload.php
index 85b3d3f..ed4729f 100644
--- a/src/Payload.php
+++ b/src/Payload.php
@@ -466,7 +466,11 @@ public function jsonSerialize()
         }
 
         if (is_array($this->urlArgs)) {
-            $payload[self::PAYLOAD_ROOT_KEY]->{self::PAYLOAD_URL_ARGS_KEY} = $this->urlArgs;
+            $payload[self::PAYLOAD_ROOT_KEY]->{self::PAYLOAD_URL_ARGS_KEY} = [];
+
+            foreach ($this->urlArgs as $key => $arg) {
+                $payload[self::PAYLOAD_ROOT_KEY]->{self::PAYLOAD_URL_ARGS_KEY}[] = $arg;
+            }
         }
 
         if (is_countable($this->customValues) && count($this->customValues)) {