diff --git a/artikcloud/apis/devices_api.py b/artikcloud/apis/devices_api.py
index 4fbf023..e611963 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):
         form_params = []
         local_var_files = {}
 
-        body_params = None
+        body_params = "{}"
 
         # HTTP header `Accept`
         header_params['Accept'] = self.api_client.\
@@ -873,7 +873,7 @@ 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(['application/json'])
 
         # Authentication setting
         auth_settings = ['artikcloud_oauth']