diff --git a/chip_id.h b/chip_id.h
index 76e1a56..b3136f3 100644
--- a/chip_id.h
+++ b/chip_id.h
@@ -4,7 +4,7 @@
  *  Created on: Dec 10, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/drivers/mcp23s17.c b/drivers/mcp23s17.c
index 32eadbc..80fe4c9 100644
--- a/drivers/mcp23s17.c
+++ b/drivers/mcp23s17.c
@@ -4,7 +4,7 @@
  *  Created on: Nov 25, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/drivers/mcp23s17.h b/drivers/mcp23s17.h
index 74484f8..9d4e1a1 100644
--- a/drivers/mcp23s17.h
+++ b/drivers/mcp23s17.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 25, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/drivers/parallel_flash.c b/drivers/parallel_flash.c
index 8d66d1c..565aad0 100644
--- a/drivers/parallel_flash.c
+++ b/drivers/parallel_flash.c
@@ -4,7 +4,7 @@
  *  Created on: Nov 25, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/drivers/parallel_flash.h b/drivers/parallel_flash.h
index 309290b..7b112a6 100644
--- a/drivers/parallel_flash.h
+++ b/drivers/parallel_flash.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 25, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/board.c b/hal/at90usb646/board.c
index 0cf5b97..b450757 100644
--- a/hal/at90usb646/board.c
+++ b/hal/at90usb646/board.c
@@ -4,7 +4,7 @@
  *  Created on: Nov 15, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/board_hw.h b/hal/at90usb646/board_hw.h
index cc3fc06..9da809b 100644
--- a/hal/at90usb646/board_hw.h
+++ b/hal/at90usb646/board_hw.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 14, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/cdc_device_definition.c b/hal/at90usb646/cdc_device_definition.c
index 10ae3f0..0511046 100644
--- a/hal/at90usb646/cdc_device_definition.c
+++ b/hal/at90usb646/cdc_device_definition.c
@@ -4,7 +4,7 @@
  *  Created on: Dec 26, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/cdc_device_definition.h b/hal/at90usb646/cdc_device_definition.h
index 030b34d..fb779fd 100644
--- a/hal/at90usb646/cdc_device_definition.h
+++ b/hal/at90usb646/cdc_device_definition.h
@@ -4,7 +4,7 @@
  *  Created on: Dec 26, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/gpio.c b/hal/at90usb646/gpio.c
index 2e49c1a..9b2f1cf 100644
--- a/hal/at90usb646/gpio.c
+++ b/hal/at90usb646/gpio.c
@@ -4,7 +4,7 @@
  *  Created on: Nov 14, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/gpio_hw.h b/hal/at90usb646/gpio_hw.h
index 382153c..b530c22 100644
--- a/hal/at90usb646/gpio_hw.h
+++ b/hal/at90usb646/gpio_hw.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 14, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/hardware.h b/hal/at90usb646/hardware.h
index c041c0d..f957273 100644
--- a/hal/at90usb646/hardware.h
+++ b/hal/at90usb646/hardware.h
@@ -4,7 +4,7 @@
  *  Created on: Dec 4, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/parallel_bus.c b/hal/at90usb646/parallel_bus.c
index 5cde102..efe647b 100644
--- a/hal/at90usb646/parallel_bus.c
+++ b/hal/at90usb646/parallel_bus.c
@@ -4,7 +4,7 @@
  *  Created on: Nov 26, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/spi.c b/hal/at90usb646/spi.c
index ad45ce4..abc067c 100644
--- a/hal/at90usb646/spi.c
+++ b/hal/at90usb646/spi.c
@@ -4,7 +4,7 @@
  *  Created on: Nov 14, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/spi_private.h b/hal/at90usb646/spi_private.h
index 68bc85d..214a8e8 100644
--- a/hal/at90usb646/spi_private.h
+++ b/hal/at90usb646/spi_private.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 14, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/usbcdc.c b/hal/at90usb646/usbcdc.c
index 6f3cf8a..a8cb2b8 100644
--- a/hal/at90usb646/usbcdc.c
+++ b/hal/at90usb646/usbcdc.c
@@ -4,7 +4,7 @@
  *  Created on: Nov 22, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/at90usb646/usbcdc_hw.h b/hal/at90usb646/usbcdc_hw.h
index afc2c42..62b9101 100644
--- a/hal/at90usb646/usbcdc_hw.h
+++ b/hal/at90usb646/usbcdc_hw.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 22, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/board.h b/hal/board.h
index 103a4be..391cf12 100644
--- a/hal/board.h
+++ b/hal/board.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 14, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/gpio.h b/hal/gpio.h
index b96350c..3e2c753 100644
--- a/hal/gpio.h
+++ b/hal/gpio.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 14, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/parallel_bus.h b/hal/parallel_bus.h
index 1424a40..4811037 100644
--- a/hal/parallel_bus.h
+++ b/hal/parallel_bus.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 26, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/spi.h b/hal/spi.h
index c37ead7..b6f43dc 100644
--- a/hal/spi.h
+++ b/hal/spi.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 14, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/hal/usbcdc.h b/hal/usbcdc.h
index 9c96a7d..fc30724 100644
--- a/hal/usbcdc.h
+++ b/hal/usbcdc.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 22, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/led.h b/led.h
index 0720f6d..ff48cca 100644
--- a/led.h
+++ b/led.h
@@ -4,7 +4,7 @@
  *  Created on: May 27, 2012
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/main.c b/main.c
index 751c7c5..8a44e91 100644
--- a/main.c
+++ b/main.c
@@ -4,7 +4,7 @@
  *  Created on: Nov 25, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/programmer_protocol.h b/programmer_protocol.h
index 4ccdc6d..235c17a 100644
--- a/programmer_protocol.h
+++ b/programmer_protocol.h
@@ -4,7 +4,7 @@
  *  Created on: Dec 26, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/simm_programmer.c b/simm_programmer.c
index f8cf2aa..b79fbea 100644
--- a/simm_programmer.c
+++ b/simm_programmer.c
@@ -4,7 +4,7 @@
  *  Created on: Dec 9, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/simm_programmer.h b/simm_programmer.h
index 1f95211..bbc9856 100644
--- a/simm_programmer.h
+++ b/simm_programmer.h
@@ -4,7 +4,7 @@
  *  Created on: Dec 9, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/tests/simm_electrical_test.c b/tests/simm_electrical_test.c
index 4453e54..a4e30bc 100644
--- a/tests/simm_electrical_test.c
+++ b/tests/simm_electrical_test.c
@@ -4,7 +4,7 @@
  *  Created on: Nov 26, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/tests/simm_electrical_test.h b/tests/simm_electrical_test.h
index 78d25b1..ce439b8 100644
--- a/tests/simm_electrical_test.h
+++ b/tests/simm_electrical_test.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 26, 2011
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
diff --git a/util.h b/util.h
index 3cfbab1..9e35140 100644
--- a/util.h
+++ b/util.h
@@ -4,7 +4,7 @@
  *  Created on: Nov 25, 2020
  *      Author: Doug
  *
- * Copyright (C) 2011-2020 Doug Brown
+ * Copyright (C) 2011-2023 Doug Brown
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License