diff --git a/artikcloud/apis/devices_api.py b/artikcloud/apis/devices_api.py
index 4deb3ac..7d65e60 100644
--- a/artikcloud/apis/devices_api.py
+++ b/artikcloud/apis/devices_api.py
@@ -863,7 +863,7 @@ def update_device_token_with_http_info(self, device_id, **kwargs):
 
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.\
-            select_header_content_type(['text/plain'])
+            select_header_content_type(['x-www-form-urlencoded'])
 
         # Authentication setting
         auth_settings = ['artikcloud_oauth']