diff --git a/tableauserverclient/server/request_factory.py b/tableauserverclient/server/request_factory.py
index 4fecdc3eb..89233d8be 100644
--- a/tableauserverclient/server/request_factory.py
+++ b/tableauserverclient/server/request_factory.py
@@ -249,6 +249,8 @@ def update_req(self, project_item):
             project_element.attrib['description'] = project_item.description
         if project_item.content_permissions:
             project_element.attrib['contentPermissions'] = project_item.content_permissions
+        if project_item.parent_id:
+            project_element.attrib['parentProjectId'] = project_item.parent_id
         return ET.tostring(xml_request)
 
     def create_req(self, project_item):