diff --git a/config/default/Configuration.h b/config/default/Configuration.h
index 231f5477e6..853fedbce7 100644
--- a/config/default/Configuration.h
+++ b/config/default/Configuration.h
@@ -1,6 +1,6 @@
 /**
  * Marlin 3D Printer Firmware
- * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  *
  * Based on Sprinter and grbl.
  * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
diff --git a/config/default/Configuration_adv.h b/config/default/Configuration_adv.h
index eec23863cb..e2621e66ee 100644
--- a/config/default/Configuration_adv.h
+++ b/config/default/Configuration_adv.h
@@ -1,6 +1,6 @@
 /**
  * Marlin 3D Printer Firmware
- * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  *
  * Based on Sprinter and grbl.
  * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm