diff --git a/docs/conf.py b/docs/conf.py
index 73bed10..8398fd0 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -23,7 +23,7 @@
 # -- Project information -----------------------------------------------------
 
 project = 'combo'
-copyright = '2019, Yue Zhao'
+copyright = '2020, Yue Zhao'
 author = 'Yue Zhao'
 
 # The short X.Y version