diff --git a/docs/en/conf.py b/docs/en/conf.py
index 9d39e749..601dd1c5 100644
--- a/docs/en/conf.py
+++ b/docs/en/conf.py
@@ -12,7 +12,7 @@ from conf_common import *
 
 # General information about the project.
 project = u'ESP8266 RTOS SDK Programming Guide'
-copyright = u'2016 - 2019, Espressif Systems (Shanghai) PTE LTD'
+copyright = u'2020, Espressif Systems (Shanghai) Co., Ltd.'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.