diff --git a/.eslintrc.js b/.eslintrc.js
index e82e66c..4a0a88f 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 /* eslint-env node */
diff --git a/src/basecommand.js b/src/basecommand.js
index b8d464d..c851bcf 100644
--- a/src/basecommand.js
+++ b/src/basecommand.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 /**
diff --git a/src/redocommand.js b/src/redocommand.js
index 9bc7ebd..4512805 100644
--- a/src/redocommand.js
+++ b/src/redocommand.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 /**
diff --git a/src/undo.js b/src/undo.js
index 8fbe5f1..998b3bd 100644
--- a/src/undo.js
+++ b/src/undo.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 /**
diff --git a/src/undocommand.js b/src/undocommand.js
index 3fa3203..390cb2f 100644
--- a/src/undocommand.js
+++ b/src/undocommand.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 /**
diff --git a/src/undoediting.js b/src/undoediting.js
index 0a0cce3..796afd6 100644
--- a/src/undoediting.js
+++ b/src/undoediting.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 /**
diff --git a/src/undoui.js b/src/undoui.js
index 57e717f..b6efb75 100644
--- a/src/undoui.js
+++ b/src/undoui.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 /**
diff --git a/tests/basecommand.js b/tests/basecommand.js
index c38e525..09e1b60 100644
--- a/tests/basecommand.js
+++ b/tests/basecommand.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 import ModelTestEditor from '@ckeditor/ckeditor5-core/tests/_utils/modeltesteditor';
diff --git a/tests/manual/undo.js b/tests/manual/undo.js
index f13078c..3ebeb3e 100644
--- a/tests/manual/undo.js
+++ b/tests/manual/undo.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 /* globals console:false, document, window */
diff --git a/tests/redocommand.js b/tests/redocommand.js
index 3bdfbf2..9ba3187 100644
--- a/tests/redocommand.js
+++ b/tests/redocommand.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 import ModelTestEditor from '@ckeditor/ckeditor5-core/tests/_utils/modeltesteditor';
diff --git a/tests/undo.js b/tests/undo.js
index 0dff1ea..92620fc 100644
--- a/tests/undo.js
+++ b/tests/undo.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 import Undo from '../src/undo';
diff --git a/tests/undocommand.js b/tests/undocommand.js
index 1e2635d..4fcfe03 100644
--- a/tests/undocommand.js
+++ b/tests/undocommand.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 import ModelTestEditor from '@ckeditor/ckeditor5-core/tests/_utils/modeltesteditor';
diff --git a/tests/undoediting-integration.js b/tests/undoediting-integration.js
index 65605fc..c8fc16d 100644
--- a/tests/undoediting-integration.js
+++ b/tests/undoediting-integration.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 /* global document */
diff --git a/tests/undoediting.js b/tests/undoediting.js
index 0c9b6b5..05d9c1d 100644
--- a/tests/undoediting.js
+++ b/tests/undoediting.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 import ModelTestEditor from '@ckeditor/ckeditor5-core/tests/_utils/modeltesteditor';
diff --git a/tests/undoui.js b/tests/undoui.js
index a7b4e0f..04c7050 100644
--- a/tests/undoui.js
+++ b/tests/undoui.js
@@ -1,6 +1,6 @@
 /**
  * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  */
 
 /* globals document */