diff --git a/client.c b/client.c
index d9f60de..52906d3 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  2009-2023
+ * Copyright (C) Miroslav Lichvar  2009-2024
  * 
  * 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
@@ -3440,7 +3440,7 @@ static void
 display_gpl(void)
 {
     printf("chrony version %s\n"
-           "Copyright (C) 1997-2003, 2007, 2009-2023 Richard P. Curnow and others\n"
+           "Copyright (C) 1997-2003, 2007, 2009-2024 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/clientlog.c b/clientlog.c
index 4297fe2..903f190 100644
--- a/clientlog.c
+++ b/clientlog.c
@@ -3,7 +3,7 @@
 
  **********************************************************************
  * Copyright (C) Richard P. Curnow  1997-2003
- * Copyright (C) Miroslav Lichvar  2009, 2015-2017, 2021
+ * Copyright (C) Miroslav Lichvar  2009, 2015-2017, 2021, 2024
  * 
  * 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/cmdmon.c b/cmdmon.c
index 49583b8..4accdf6 100644
--- a/cmdmon.c
+++ b/cmdmon.c
@@ -3,7 +3,7 @@
 
  **********************************************************************
  * Copyright (C) Richard P. Curnow  1997-2003
- * Copyright (C) Miroslav Lichvar  2009-2016, 2018-2023
+ * Copyright (C) Miroslav Lichvar  2009-2016, 2018-2024
  * 
  * 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/chrony.conf.adoc b/doc/chrony.conf.adoc
index a5b49b1..2c993db 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  2009-2023
+// Copyright (C) Miroslav Lichvar  2009-2024
 //
 // 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 144bb8c..fa1b6ad 100644
--- a/doc/faq.adoc
+++ b/doc/faq.adoc
@@ -2,7 +2,7 @@
 //
 // Copyright (C) Richard P. Curnow  1997-2003
 // Copyright (C) Luke Valenta  2023
-// Copyright (C) Miroslav Lichvar  2014-2016, 2020-2023
+// Copyright (C) Miroslav Lichvar  2014-2016, 2020-2024
 //
 // 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/leapdb.h b/leapdb.h
index eab2414..d4725b9 100644
--- a/leapdb.h
+++ b/leapdb.h
@@ -2,7 +2,7 @@
   chronyd/chronyc - Programs for keeping computer clocks accurate.
 
  **********************************************************************
- * Copyright (C) Patrick Oppenlander 2023
+ * Copyright (C) Patrick Oppenlander 2024
  *
  * 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_core.c b/ntp_core.c
index 9ae1432..2965413 100644
--- a/ntp_core.c
+++ b/ntp_core.c
@@ -3,7 +3,7 @@
 
  **********************************************************************
  * Copyright (C) Richard P. Curnow  1997-2003
- * Copyright (C) Miroslav Lichvar  2009-2023
+ * Copyright (C) Miroslav Lichvar  2009-2024
  * 
  * 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 d2cd113..f117e33 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, 2020-2023
+ * Copyright (C) Miroslav Lichvar  2011-2012, 2014, 2016, 2020-2024
  * 
  * 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/reference.c b/reference.c
index 009d7c9..bb2c48a 100644
--- a/reference.c
+++ b/reference.c
@@ -4,6 +4,7 @@
  **********************************************************************
  * Copyright (C) Richard P. Curnow  1997-2003
  * Copyright (C) Miroslav Lichvar  2009-2018, 2020, 2022
+ * Copyright (C) Andy Fiddaman  2024
  * 
  * 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/sources.c b/sources.c
index ff7a792..e292e4d 100644
--- a/sources.c
+++ b/sources.c
@@ -3,7 +3,7 @@
 
  **********************************************************************
  * Copyright (C) Richard P. Curnow  1997-2003
- * Copyright (C) Miroslav Lichvar  2011-2016, 2018, 2020-2023
+ * Copyright (C) Miroslav Lichvar  2011-2016, 2018, 2020-2024
  * 
  * 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/clientlog.c b/test/unit/clientlog.c
index f08b949..96818b2 100644
--- a/test/unit/clientlog.c
+++ b/test/unit/clientlog.c
@@ -1,6 +1,6 @@
 /*
  **********************************************************************
- * Copyright (C) Miroslav Lichvar  2016, 2021
+ * Copyright (C) Miroslav Lichvar  2016, 2021, 2024
  * 
  * 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/leapdb.c b/test/unit/leapdb.c
index f2f0228..cb27387 100644
--- a/test/unit/leapdb.c
+++ b/test/unit/leapdb.c
@@ -1,6 +1,6 @@
 /*
  **********************************************************************
- * Copyright (C) Patrick Oppenlander 2023
+ * Copyright (C) Patrick Oppenlander 2024
  *
  * 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