diff --git a/LICENSE b/LICENSE
index 7d1e2311f4..173a9ebbbd 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,7 +1,7 @@
 The MIT License (MIT)
 
-Copyright (c) 2011-2019 Twitter, Inc.
-Copyright (c) 2011-2019 The Bootstrap Authors
+Copyright (c) 2011-2020 Twitter, Inc.
+Copyright (c) 2011-2020 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 01dad95a52..4f62761d75 100644
--- a/README.md
+++ b/README.md
@@ -213,4 +213,4 @@ Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com
 
 ## Copyright and license
 
-Code and documentation copyright 2011-2019 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/master/LICENSE). Docs released under [Creative Commons](https://creativecommons.org/licenses/by/3.0/).
+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/master/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 bf64021de3..111ffeeeac 100644
--- a/build/build-plugins.js
+++ b/build/build-plugins.js
@@ -1,7 +1,7 @@
 /*!
  * Script to build our plugins to use them separately.
- * Copyright 2019 The Bootstrap Authors
- * Copyright 2019 Twitter, Inc.
+ * Copyright 2020 The Bootstrap Authors
+ * Copyright 2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 
diff --git a/build/change-version.js b/build/change-version.js
index d7627dde31..d6fcbfc5a9 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 2017-2019 The Bootstrap Authors
- * Copyright 2017-2019 Twitter, Inc.
+ * Copyright 2017-2020 The Bootstrap Authors
+ * Copyright 2017-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 
diff --git a/build/generate-sri.js b/build/generate-sri.js
index 267419dda0..36bb4657d6 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 2017-2019 The Bootstrap Authors
- * Copyright 2017-2019 Twitter, Inc.
+ * Copyright 2017-2020 The Bootstrap Authors
+ * Copyright 2017-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 
diff --git a/build/vnu-jar.js b/build/vnu-jar.js
index 8c5190dbea..53fc58636f 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 2017-2019 The Bootstrap Authors
- * Copyright 2017-2019 Twitter, Inc.
+ * Copyright 2017-2020 The Bootstrap Authors
+ * Copyright 2017-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 
diff --git a/nuget/bootstrap.nuspec b/nuget/bootstrap.nuspec
index 36a0f84f7e..2ac2ae65f8 100644
--- a/nuget/bootstrap.nuspec
+++ b/nuget/bootstrap.nuspec
@@ -13,7 +13,7 @@
     <projectUrl>https://getbootstrap.com/</projectUrl>
     <iconUrl>https://getbootstrap.com/docs/4.3/assets/img/favicons/apple-touch-icon.png</iconUrl>
     <license type="file">LICENSE.txt</license>
-    <copyright>Copyright 2017-2019</copyright>
+    <copyright>Copyright 2017-2020</copyright>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <dependencies>
       <dependency id="popper.js" version="[1.16.0,2)" />
diff --git a/nuget/bootstrap.sass.nuspec b/nuget/bootstrap.sass.nuspec
index 8555c30d12..b915aa65cc 100644
--- a/nuget/bootstrap.sass.nuspec
+++ b/nuget/bootstrap.sass.nuspec
@@ -13,7 +13,7 @@
     <projectUrl>https://getbootstrap.com/</projectUrl>
     <iconUrl>https://getbootstrap.com/docs/4.3/assets/img/favicons/apple-touch-icon.png</iconUrl>
     <license type="file">LICENSE.txt</license>
-    <copyright>Copyright 2017-2019</copyright>
+    <copyright>Copyright 2017-2020</copyright>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <dependencies>
       <dependency id="popper.js" version="[1.16.0,2)" />
diff --git a/scss/bootstrap-grid.scss b/scss/bootstrap-grid.scss
index 619aa1e83e..bf609352e4 100644
--- a/scss/bootstrap-grid.scss
+++ b/scss/bootstrap-grid.scss
@@ -1,7 +1,7 @@
 /*!
  * Bootstrap Grid v4.3.1 (https://getbootstrap.com/)
- * Copyright 2011-2019 The Bootstrap Authors
- * Copyright 2011-2019 Twitter, Inc.
+ * Copyright 2011-2020 The Bootstrap Authors
+ * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 
diff --git a/scss/bootstrap-reboot.scss b/scss/bootstrap-reboot.scss
index 2983f3f6df..bc1c64774a 100644
--- a/scss/bootstrap-reboot.scss
+++ b/scss/bootstrap-reboot.scss
@@ -1,7 +1,7 @@
 /*!
  * Bootstrap Reboot v4.3.1 (https://getbootstrap.com/)
- * Copyright 2011-2019 The Bootstrap Authors
- * Copyright 2011-2019 Twitter, Inc.
+ * Copyright 2011-2020 The Bootstrap Authors
+ * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
  */
diff --git a/scss/bootstrap-utilities.scss b/scss/bootstrap-utilities.scss
index 8fc81b9dd4..b05525a217 100644
--- a/scss/bootstrap-utilities.scss
+++ b/scss/bootstrap-utilities.scss
@@ -1,7 +1,7 @@
 /*!
  * Bootstrap Utilities v4.3.1 (https://getbootstrap.com/)
- * Copyright 2011-2019 The Bootstrap Authors
- * Copyright 2011-2019 Twitter, Inc.
+ * Copyright 2011-2020 The Bootstrap Authors
+ * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 
diff --git a/scss/bootstrap.scss b/scss/bootstrap.scss
index 7138211c48..a2f0554537 100644
--- a/scss/bootstrap.scss
+++ b/scss/bootstrap.scss
@@ -1,7 +1,7 @@
 /*!
  * Bootstrap v4.3.1 (https://getbootstrap.com/)
- * Copyright 2011-2019 The Bootstrap Authors
- * Copyright 2011-2019 Twitter, Inc.
+ * Copyright 2011-2020 The Bootstrap Authors
+ * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 
diff --git a/site/assets/js/application.js b/site/assets/js/application.js
index ce3a3d96b3..31679f11b3 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 2011-2019 The Bootstrap Authors
- * Copyright 2011-2019 Twitter, Inc.
+ * Copyright 2011-2020 The Bootstrap Authors
+ * Copyright 2011-2020 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 8cf0e198fb..7ff78b215e 100644
--- a/site/assets/scss/docs.scss
+++ b/site/assets/scss/docs.scss
@@ -1,7 +1,7 @@
 /*!
  * Bootstrap Docs (https://getbootstrap.com/)
- * Copyright 2011-2019 The Bootstrap Authors
- * Copyright 2011-2019 Twitter, Inc.
+ * Copyright 2011-2020 The Bootstrap Authors
+ * Copyright 2011-2020 Twitter, Inc.
  * Licensed under the Creative Commons Attribution 3.0 Unported License.
  * For details, see https://creativecommons.org/licenses/by/3.0/.
  */