diff --git a/doc/example/chap/abstract.tex b/doc/example/chap/abstract.tex
index 0e60982..f21fdef 100644
--- a/doc/example/chap/abstract.tex
+++ b/doc/example/chap/abstract.tex
@@ -1,5 +1,5 @@
 % vim:ts=4:sw=4
-% Copyright (c) 2014 Casper Ti. Vector
+% Copyright (c) 2014,2016 Casper Ti. Vector
 % Public domain.
 
 \begin{cabstract}
diff --git a/doc/example/chap/acknowledge.tex b/doc/example/chap/acknowledge.tex
index 307b824..53a00b6 100644
--- a/doc/example/chap/acknowledge.tex
+++ b/doc/example/chap/acknowledge.tex
@@ -1,5 +1,5 @@
 % vim:ts=4:sw=4
-% Copyright (c) 2014 Casper Ti. Vector
+% Copyright (c) 2014,2016 Casper Ti. Vector
 % Public domain.
 
 \chapter{致谢}
diff --git a/doc/example/chap/chap1.tex b/doc/example/chap/chap1.tex
index 4ecd84a..1367162 100644
--- a/doc/example/chap/chap1.tex
+++ b/doc/example/chap/chap1.tex
@@ -1,5 +1,5 @@
 % vim:ts=4:sw=4
-% Copyright (c) 2014 Casper Ti. Vector
+% Copyright (c) 2014,2016 Casper Ti. Vector
 % Public domain.
 
 \chapter{章节}
diff --git a/doc/example/chap/conclusion.tex b/doc/example/chap/conclusion.tex
index 6547a7c..6212182 100644
--- a/doc/example/chap/conclusion.tex
+++ b/doc/example/chap/conclusion.tex
@@ -1,5 +1,5 @@
 % vim:ts=4:sw=4
-% Copyright (c) 2014 Casper Ti. Vector
+% Copyright (c) 2014,2016 Casper Ti. Vector
 % Public domain.
 
 \specialchap{结论}
diff --git a/doc/example/chap/encl1.tex b/doc/example/chap/encl1.tex
index 2f9a718..eee2cf4 100644
--- a/doc/example/chap/encl1.tex
+++ b/doc/example/chap/encl1.tex
@@ -1,5 +1,5 @@
 % vim:ts=4:sw=4
-% Copyright (c) 2014 Casper Ti. Vector
+% Copyright (c) 2014,2016 Casper Ti. Vector
 % Public domain.
 
 \chapter{附件}
diff --git a/doc/example/chap/introduction.tex b/doc/example/chap/introduction.tex
index 1cdac4d..0d01ee6 100644
--- a/doc/example/chap/introduction.tex
+++ b/doc/example/chap/introduction.tex
@@ -1,5 +1,5 @@
 % vim:ts=4:sw=4
-% Copyright (c) 2014 Casper Ti. Vector
+% Copyright (c) 2014,2016 Casper Ti. Vector
 % Public domain.
 
 \specialchap{序言}
diff --git a/doc/example/thesis.tex b/doc/example/thesis.tex
index 1413cda..e49d523 100644
--- a/doc/example/thesis.tex
+++ b/doc/example/thesis.tex
@@ -1,7 +1,7 @@
 % vim:ts=4:sw=4
 %
 % Copyright (c) 2008-2009 solvethis
-% Copyright (c) 2010-2015 Casper Ti. Vector
+% Copyright (c) 2010-2016 Casper Ti. Vector
 % Public domain.
 %
 % 使用前请先仔细阅读 pkuthss 和 biblatex-caspervector 的文档，
diff --git a/tex/pkuthss.cls b/tex/pkuthss.cls
index 0648895..24728dd 100644
--- a/tex/pkuthss.cls
+++ b/tex/pkuthss.cls
@@ -3,7 +3,7 @@
 % Peking University dissertation document class
 %
 % Copyright (c) 2008-2009 solvethis
-% Copyright (c) 2010-2015 Casper Ti. Vector
+% Copyright (c) 2010-2016 Casper Ti. Vector
 %
 % This work may be distributed and/or modified under the conditions of the
 % LaTeX Project Public License, either version 1.3 of this license or (at