diff --git a/include/aprs_pico.h b/include/aprs_pico.h
index 09f4daf..6c51c81 100644
--- a/include/aprs_pico.h
+++ b/include/aprs_pico.h
@@ -1,6 +1,6 @@
 /*
 * Project 'raspi-pico-aprs-tnc'
-* Copyright (C) 2021 Thomas Glau, DL3TG
+* Copyright (C) 2021-2023 Thomas Glau, DL3TG
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
diff --git a/src/aprs_pico.c b/src/aprs_pico.c
index 6307f9e..1bb46b4 100644
--- a/src/aprs_pico.c
+++ b/src/aprs_pico.c
@@ -1,6 +1,6 @@
 /*
 * Project 'raspi-pico-aprs-tnc'
-* Copyright (C) 2021 Thomas Glau, DL3TG
+* Copyright (C) 2021-2023 Thomas Glau, DL3TG
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
diff --git a/src/aprs_pico_example.c b/src/aprs_pico_example.c
index aa2ad21..8682a6b 100644
--- a/src/aprs_pico_example.c
+++ b/src/aprs_pico_example.c
@@ -1,6 +1,6 @@
 /*
 * Project 'raspi-pico-aprs-tnc'
-* Copyright (C) 2021 Thomas Glau, DL3TG
+* Copyright (C) 2021-2023 Thomas Glau, DL3TG
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by