diff --git a/LICENSE.txt b/LICENSE.txt
index d63e7299..3f6c4670 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,6 +1,7 @@
 MIT License
 
 Copyright (c) 2019-2021 Roblox Corporation
+Copyright (c) 1994–2019 Lua.org, PUC-Rio.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in