diff --git a/doc/conf.py b/doc/conf.py
index 11bed51d..1a5c217b 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -14,7 +14,7 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'notmuch'
-copyright = u'2009-2020, Carl Worth and many others'
+copyright = u'2009-2021, Carl Worth and many others'
 
 location = os.path.dirname(__file__)