diff --git a/doc/conf.py.in b/doc/conf.py.in
index 81d83a1..c8a8239 100644
--- a/doc/conf.py.in
+++ b/doc/conf.py.in
@@ -64,7 +64,7 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'Spdylay'
-copyright = u'2012, Tatsuhiro Tsujikawa'
+copyright = u'2012, 2013, Tatsuhiro Tsujikawa'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the