diff --git a/LICENSE b/LICENSE
index 173a9ebbbd7a..72dda234edaa 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,7 +1,7 @@
 The MIT License (MIT)
 
-Copyright (c) 2011-2020 Twitter, Inc.
-Copyright (c) 2011-2020 The Bootstrap Authors
+Copyright (c) 2011-2021 Twitter, Inc.
+Copyright (c) 2011-2021 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
diff --git a/README.md b/README.md
index 833787f1c6a0..51cd31c90eb7 100644
--- a/README.md
+++ b/README.md
@@ -206,4 +206,4 @@ Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com
 
 ## Copyright and license
 
-Code and documentation copyright 2011-2020 the [Bootstrap Authors](https://github.com/twbs/bootstrap/graphs/contributors) and [Twitter, Inc.](https://twitter.com) Code released under the [MIT License](https://github.com/twbs/bootstrap/blob/main/LICENSE). Docs released under [Creative Commons](https://creativecommons.org/licenses/by/3.0/).
+Code and documentation copyright 2011-2021 the [Bootstrap Authors](https://github.com/twbs/bootstrap/graphs/contributors) and [Twitter, Inc.](https://twitter.com) Code released under the [MIT License](https://github.com/twbs/bootstrap/blob/main/LICENSE). Docs released under [Creative Commons](https://creativecommons.org/licenses/by/3.0/).
diff --git a/build/build-plugins.js b/build/build-plugins.js
index 3406f50ba3f7..ffdf0d1e9b4c 100644
--- a/build/build-plugins.js
+++ b/build/build-plugins.js
@@ -2,8 +2,8 @@
 
 /*!
  * Script to build our plugins to use them separately.
- * Copyright 2020 The Bootstrap Authors
- * Copyright 2020 Twitter, Inc.
+ * Copyright 2020-2021 The Bootstrap Authors
+ * Copyright 2020-2021 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
diff --git a/build/change-version.js b/build/change-version.js
index e2de874d7f87..78bc8464bd14 100755
--- a/build/change-version.js
+++ b/build/change-version.js
@@ -2,8 +2,8 @@
 
 /*!
  * Script to update version number references in the project.
- * Copyright 2017-2020 The Bootstrap Authors
- * Copyright 2017-2020 Twitter, Inc.
+ * Copyright 2017-2021 The Bootstrap Authors
+ * Copyright 2017-2021 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
diff --git a/build/generate-sri.js b/build/generate-sri.js
index f5df6613158b..a326f67761fa 100644
--- a/build/generate-sri.js
+++ b/build/generate-sri.js
@@ -5,8 +5,8 @@
  * Remember to use the same vendor files as the CDN ones,
  * otherwise the hashes won't match!
  *
- * Copyright 2017-2020 The Bootstrap Authors
- * Copyright 2017-2020 Twitter, Inc.
+ * Copyright 2017-2021 The Bootstrap Authors
+ * Copyright 2017-2021 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
diff --git a/build/vnu-jar.js b/build/vnu-jar.js
index f4a4141c16f1..d211ce5772f0 100644
--- a/build/vnu-jar.js
+++ b/build/vnu-jar.js
@@ -2,8 +2,8 @@
 
 /*!
  * Script to run vnu-jar if Java is available.
- * Copyright 2017-2020 The Bootstrap Authors
- * Copyright 2017-2020 Twitter, Inc.
+ * Copyright 2017-2021 The Bootstrap Authors
+ * Copyright 2017-2021 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
diff --git a/build/zip-examples.js b/build/zip-examples.js
index 778d75f05bdb..002f7fb2ff88 100644
--- a/build/zip-examples.js
+++ b/build/zip-examples.js
@@ -3,7 +3,7 @@
 /*!
  * Script to create the built examples zip archive;
  * requires the `zip` command to be present!
- * Copyright 2020 The Bootstrap Authors
+ * Copyright 2020-2021 The Bootstrap Authors
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
diff --git a/nuget/bootstrap.nuspec b/nuget/bootstrap.nuspec
index 9d8d190d3c7f..8e7a0a322781 100644
--- a/nuget/bootstrap.nuspec
+++ b/nuget/bootstrap.nuspec
@@ -14,7 +14,7 @@
     <projectUrl>https://getbootstrap.com/</projectUrl>
     <icon>bootstrap.png</icon>
     <license type="file">LICENSE.txt</license>
-    <copyright>Copyright 2017-2020</copyright>
+    <copyright>Copyright 2017-2021</copyright>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <dependencies>
       <dependency id="jQuery" version="[3.0.0,4)" />
diff --git a/nuget/bootstrap.sass.nuspec b/nuget/bootstrap.sass.nuspec
index 72b1e3aaf19f..015726a67dad 100644
--- a/nuget/bootstrap.sass.nuspec
+++ b/nuget/bootstrap.sass.nuspec
@@ -14,7 +14,7 @@
     <projectUrl>https://getbootstrap.com/</projectUrl>
     <icon>bootstrap.png</icon>
     <license type="file">LICENSE.txt</license>
-    <copyright>Copyright 2017-2020</copyright>
+    <copyright>Copyright 2017-2021</copyright>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <dependencies>
       <dependency id="jQuery" version="[3.0.0,4)" />
diff --git a/scss/bootstrap-grid.scss b/scss/bootstrap-grid.scss
index d88b9c8fb87d..f59ed536a7b8 100644
--- a/scss/bootstrap-grid.scss
+++ b/scss/bootstrap-grid.scss
@@ -1,7 +1,7 @@
 /*!
  * Bootstrap Grid v4.5.3 (https://getbootstrap.com/)
- * Copyright 2011-2020 The Bootstrap Authors
- * Copyright 2011-2020 Twitter, Inc.
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
diff --git a/scss/bootstrap-reboot.scss b/scss/bootstrap-reboot.scss
index de63f528bfd1..ca1335a254ed 100644
--- a/scss/bootstrap-reboot.scss
+++ b/scss/bootstrap-reboot.scss
@@ -1,7 +1,7 @@
 /*!
  * Bootstrap Reboot v4.5.3 (https://getbootstrap.com/)
- * Copyright 2011-2020 The Bootstrap Authors
- * Copyright 2011-2020 Twitter, Inc.
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
  */
diff --git a/scss/bootstrap.scss b/scss/bootstrap.scss
index 0a206557bea5..804a3b31557d 100644
--- a/scss/bootstrap.scss
+++ b/scss/bootstrap.scss
@@ -1,7 +1,7 @@
 /*!
  * Bootstrap v4.5.3 (https://getbootstrap.com/)
- * Copyright 2011-2020 The Bootstrap Authors
- * Copyright 2011-2020 Twitter, Inc.
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
 
diff --git a/site/assets/js/application.js b/site/assets/js/application.js
index ca1ddcca009e..8f0cddd8a4cf 100644
--- a/site/assets/js/application.js
+++ b/site/assets/js/application.js
@@ -4,8 +4,8 @@
 
 /*!
  * JavaScript for Bootstrap's docs (https://getbootstrap.com/)
- * Copyright 2011-2020 The Bootstrap Authors
- * Copyright 2011-2020 Twitter, Inc.
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
  * Licensed under the Creative Commons Attribution 3.0 Unported License.
  * For details, see https://creativecommons.org/licenses/by/3.0/.
  */
diff --git a/site/assets/scss/docs.scss b/site/assets/scss/docs.scss
index 0f1d68cdb48c..1dc3016e0e4c 100644
--- a/site/assets/scss/docs.scss
+++ b/site/assets/scss/docs.scss
@@ -1,7 +1,7 @@
 /*!
  * Bootstrap Docs (https://getbootstrap.com/)
- * Copyright 2011-2020 The Bootstrap Authors
- * Copyright 2011-2020 Twitter, Inc.
+ * Copyright 2011-2021 The Bootstrap Authors
+ * Copyright 2011-2021 Twitter, Inc.
  * Licensed under the Creative Commons Attribution 3.0 Unported License.
  * For details, see https://creativecommons.org/licenses/by/3.0/.
  */