diff --git a/client.c b/client.c
index 17e4577..cc179c6 100644
--- a/client.c
+++ b/client.c
@@ -4,7 +4,7 @@
  **********************************************************************
  * Copyright (C) Richard P. Curnow  1997-2003
  * Copyright (C) Lonnie Abelbeck  2016, 2018
- * Copyright (C) Miroslav Lichvar  2009-2020
+ * Copyright (C) Miroslav Lichvar  2009-2021
  * 
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -3458,7 +3458,7 @@ static void
 display_gpl(void)
 {
     printf("chrony version %s\n"
-           "Copyright (C) 1997-2003, 2007, 2009-2020 Richard P. Curnow and others\n"
+           "Copyright (C) 1997-2003, 2007, 2009-2021 Richard P. Curnow and others\n"
            "chrony comes with ABSOLUTELY NO WARRANTY.  This is free software, and\n"
            "you are welcome to redistribute it under certain conditions.  See the\n"
            "GNU General Public License version 2 for details.\n\n",
diff --git a/cmdmon.c b/cmdmon.c
index 7ee8c12..8cbcd80 100644
--- a/cmdmon.c
+++ b/cmdmon.c
@@ -3,7 +3,7 @@
 
  **********************************************************************
  * Copyright (C) Richard P. Curnow  1997-2003
- * Copyright (C) Miroslav Lichvar  2009-2016, 2018-2020
+ * Copyright (C) Miroslav Lichvar  2009-2016, 2018-2021
  * 
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
diff --git a/configure b/configure
index 729a9d4..5b8948f 100755
--- a/configure
+++ b/configure
@@ -5,7 +5,7 @@
 #
 # Copyright (C) Richard P. Curnow  1997-2003
 # Copyright (C) Bryan Christianson  2016
-# Copyright (C) Miroslav Lichvar  2009, 2012-2020
+# Copyright (C) Miroslav Lichvar  2009, 2012-2021
 # Copyright (C) Stefan R. Filipek  2019
 #
 # =======================================================================
diff --git a/doc/chrony.conf.adoc b/doc/chrony.conf.adoc
index 347f5f2..9134fb5 100644
--- a/doc/chrony.conf.adoc
+++ b/doc/chrony.conf.adoc
@@ -3,7 +3,7 @@
 // Copyright (C) Richard P. Curnow  1997-2003
 // Copyright (C) Stephen Wadeley  2016
 // Copyright (C) Bryan Christianson  2017
-// Copyright (C) Miroslav Lichvar  2009-2020
+// Copyright (C) Miroslav Lichvar  2009-2021
 //
 // This program is free software; you can redistribute it and/or modify
 // it under the terms of version 2 of the GNU General Public License as
diff --git a/doc/faq.adoc b/doc/faq.adoc
index 4076e9c..80853b4 100644
--- a/doc/faq.adoc
+++ b/doc/faq.adoc
@@ -1,7 +1,7 @@
 // This file is part of chrony
 //
 // Copyright (C) Richard P. Curnow  1997-2003
-// Copyright (C) Miroslav Lichvar  2014-2016, 2020
+// Copyright (C) Miroslav Lichvar  2014-2016, 2020-2021
 //
 // This program is free software; you can redistribute it and/or modify
 // it under the terms of version 2 of the GNU General Public License as
diff --git a/ntp_sources.c b/ntp_sources.c
index 02c7eda..852602a 100644
--- a/ntp_sources.c
+++ b/ntp_sources.c
@@ -3,7 +3,7 @@
 
  **********************************************************************
  * Copyright (C) Richard P. Curnow  1997-2003
- * Copyright (C) Miroslav Lichvar  2011-2012, 2014, 2016, 2020
+ * Copyright (C) Miroslav Lichvar  2011-2012, 2014, 2016, 2020-2021
  * 
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
diff --git a/nts_ke_client.c b/nts_ke_client.c
index d1936b6..c22b0eb 100644
--- a/nts_ke_client.c
+++ b/nts_ke_client.c
@@ -2,7 +2,7 @@
   chronyd/chronyc - Programs for keeping computer clocks accurate.
 
  **********************************************************************
- * Copyright (C) Miroslav Lichvar  2020
+ * Copyright (C) Miroslav Lichvar  2020-2021
  * 
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
diff --git a/nts_ke_session.c b/nts_ke_session.c
index 97b135d..96b08c1 100644
--- a/nts_ke_session.c
+++ b/nts_ke_session.c
@@ -2,7 +2,7 @@
   chronyd/chronyc - Programs for keeping computer clocks accurate.
 
  **********************************************************************
- * Copyright (C) Miroslav Lichvar  2020
+ * Copyright (C) Miroslav Lichvar  2020-2021
  * 
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
diff --git a/sourcestats.c b/sourcestats.c
index 066d0e4..7dfc9db 100644
--- a/sourcestats.c
+++ b/sourcestats.c
@@ -3,7 +3,7 @@
 
  **********************************************************************
  * Copyright (C) Richard P. Curnow  1997-2003
- * Copyright (C) Miroslav Lichvar  2011-2014, 2016-2018
+ * Copyright (C) Miroslav Lichvar  2011-2014, 2016-2018, 2021
  * 
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
diff --git a/test/unit/ntp_sources.c b/test/unit/ntp_sources.c
index 9da88aa..e8b7420 100644
--- a/test/unit/ntp_sources.c
+++ b/test/unit/ntp_sources.c
@@ -1,6 +1,6 @@
 /*
  **********************************************************************
- * Copyright (C) Miroslav Lichvar  2016
+ * Copyright (C) Miroslav Lichvar  2016, 2021
  * 
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
diff --git a/test/unit/util.c b/test/unit/util.c
index 42967eb..88a623d 100644
--- a/test/unit/util.c
+++ b/test/unit/util.c
@@ -1,6 +1,6 @@
 /*
  **********************************************************************
- * Copyright (C) Miroslav Lichvar  2017-2018
+ * Copyright (C) Miroslav Lichvar  2017-2018, 2021
  * 
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as