diff --git a/LICENSE.txt b/LICENSE.txt
index 6a7da5218..a19c072c2 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,6 +1,6 @@
 (The MIT License)
 
-Copyright 2020-2021 Optimism
+Copyright 2020-2023 Optimism
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the