diff --git a/NOTICE.txt b/NOTICE.txt
index a470601b..ed61cf6b 100644
--- a/NOTICE.txt
+++ b/NOTICE.txt
@@ -1,4 +1,4 @@
-Copyright 2020-2022 MITRE Engenuity. Approved for public release. Document number CT0020 and public release case number 22-3206.
+Copyright 2020-2023 MITRE Engenuity. Approved for public release. Document number CT0020 and public release case number 22-3206.
 
 Licensed under the Apache License, Version 2.0 (the "License"); 
 you may not use this file except in compliance with the License. 
diff --git a/README.md b/README.md
index 3b15c6ee..06c0ecfb 100644
--- a/README.md
+++ b/README.md
@@ -117,7 +117,7 @@ https://github.com/mitre-attack/attack-navigator/
 
 ## Notice 
 
-Copyright 2020-2022 MITRE Engenuity. Approved for public release. Document number CT0020 and public release case number 22-3206.
+Copyright 2020-2023 MITRE Engenuity. Approved for public release. Document number CT0020 and public release case number 22-3206.
 
 Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at