diff --git a/README.md b/README.md
index 6ada83f1d7..227935d3c3 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 ## GZDoom is a modder-friendly OpenGL and Vulkan source port based on the DOOM engine
 
-Copyright (c) 1998-2022 ZDoom + GZDoom teams, and contributors
+Copyright (c) 1998-2023 ZDoom + GZDoom teams, and contributors
 
 Doom Source (c) 1997 id Software, Raven Software, and contributors
 
diff --git a/wadsrc/static/zscript/zscript_license.txt b/wadsrc/static/zscript/zscript_license.txt
index 80e69ad529..92d01cb31e 100644
--- a/wadsrc/static/zscript/zscript_license.txt
+++ b/wadsrc/static/zscript/zscript_license.txt
@@ -2,7 +2,7 @@ Unless noted differently in the file, the following license applies to all ZScri
 
 //-----------------------------------------------------------------------------
 //
-// Copyright 1993-2020 id Software, Randy Heit, Christoph Oelckers et.al.
+// Copyright 1993-2023 id Software, Randy Heit, Christoph Oelckers et.al.
 //
 // 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
@@ -25,7 +25,7 @@ Unless noted differently in the file, the following license applies to all ZScri
 /*
 **
 **---------------------------------------------------------------------------
-** Copyright 2005-2020 Randy Heit, Christoph Oelckers et.al.
+** Copyright 2005-2023 Randy Heit, Christoph Oelckers et.al.
 ** All rights reserved.
 **
 ** Redistribution and use in source and binary forms, with or without