diff --git a/doc/release_notes.html b/doc/release_notes.html
index aafcc9b..2dd0487 100644
--- a/doc/release_notes.html
+++ b/doc/release_notes.html
@@ -30,6 +30,7 @@ Acknowledgements
 <h2>Contents</h2>
 
 <ul>
+  <li><a href="#boost_1_80">Boost 1.80 release</a></li>
   <li><a href="#boost_1_79">Boost 1.79 release</a></li>
   <li><a href="#boost_1_78">Boost 1.78 release</a></li>
   <li><a href="#boost_1_77">Boost 1.77 release</a></li>
@@ -66,6 +67,14 @@ Acknowledgements
   <li><a href="#boost_1_33">Boost 1.33 release</a></li>
 </ul>
 
+<h2><a name="boost_1_80">Boost 1.80 release</a></h2>
+
+<p>
+<ul>
+  <li>Maintenance work.</li>
+</ul>
+</p>
+
 <h2><a name="boost_1_79">Boost 1.79 release</a></h2>
 
 <p>
@@ -737,7 +746,7 @@ Acknowledgements
 
 <br>
 
-<p>Revised April 3rd 2022</p>
+<p>Revised April 8th 2022</p>
 
 <p>&copy; Copyright 2003-2022 Joaqu&iacute;n M L&oacute;pez Mu&ntilde;oz.
 Distributed under the Boost Software 
diff --git a/include/boost/multi_index/composite_key.hpp b/include/boost/multi_index/composite_key.hpp
index e9666a4..d2c1836 100644
--- a/include/boost/multi_index/composite_key.hpp
+++ b/include/boost/multi_index/composite_key.hpp
@@ -1,4 +1,4 @@
-/* Copyright 2003-2015 Joaquin M Lopez Munoz.
+/* Copyright 2003-2022 Joaquin M Lopez Munoz.
  * Distributed under the Boost Software License, Version 1.0.
  * (See accompanying file LICENSE_1_0.txt or copy at
  * http://www.boost.org/LICENSE_1_0.txt)
diff --git a/include/boost/multi_index/detail/ord_index_impl.hpp b/include/boost/multi_index/detail/ord_index_impl.hpp
index f07f2e9..93d47df 100644
--- a/include/boost/multi_index/detail/ord_index_impl.hpp
+++ b/include/boost/multi_index/detail/ord_index_impl.hpp
@@ -1,4 +1,4 @@
-/* Copyright 2003-2021 Joaquin M Lopez Munoz.
+/* Copyright 2003-2022 Joaquin M Lopez Munoz.
  * Distributed under the Boost Software License, Version 1.0.
  * (See accompanying file LICENSE_1_0.txt or copy at
  * http://www.boost.org/LICENSE_1_0.txt)
diff --git a/test/test_key_extractors.cpp b/test/test_key_extractors.cpp
index bb1e5f6..75cb5aa 100644
--- a/test/test_key_extractors.cpp
+++ b/test/test_key_extractors.cpp
@@ -1,6 +1,6 @@
 /* Boost.MultiIndex test for key extractors.
  *
- * Copyright 2003-2020 Joaquin M Lopez Munoz.
+ * Copyright 2003-2022 Joaquin M Lopez Munoz.
  * Distributed under the Boost Software License, Version 1.0.
  * (See accompanying file LICENSE_1_0.txt or copy at
  * http://www.boost.org/LICENSE_1_0.txt)
diff --git a/test/test_rearrange.cpp b/test/test_rearrange.cpp
index 102a6ab..170eabd 100644
--- a/test/test_rearrange.cpp
+++ b/test/test_rearrange.cpp
@@ -1,6 +1,6 @@
 /* Boost.MultiIndex test for rearrange operations.
  *
- * Copyright 2003-2013 Joaquin M Lopez Munoz.
+ * Copyright 2003-2022 Joaquin M Lopez Munoz.
  * Distributed under the Boost Software License, Version 1.0.
  * (See accompanying file LICENSE_1_0.txt or copy at
  * http://www.boost.org/LICENSE_1_0.txt)