diff --git a/src/reference/docbook/index.xml b/src/reference/docbook/index.xml
index f11a32aaee..a3e2c92d5c 100644
--- a/src/reference/docbook/index.xml
+++ b/src/reference/docbook/index.xml
@@ -160,7 +160,7 @@
     </authorgroup>
 
     <copyright>
-      <year>2004-2013</year>
+      <year>2004-2016</year>
     </copyright>
 
     <legalnotice>