diff --git a/NOTICE.txt b/NOTICE.txt
index 4db3d1af..64b9a279 100644
--- a/NOTICE.txt
+++ b/NOTICE.txt
@@ -56,7 +56,8 @@ The most popular front-end framework for developing responsive, mobile first pro
 
 The MIT License (MIT)
 
-Copyright (c) 2011-2018 Twitter, Inc.
+Copyright (c) 2011-2019 Twitter, Inc.
+Copyright (c) 2011-2019 The Bootstrap Authors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal