diff --git a/src/wp-includes/Text/Diff.php b/src/wp-includes/Text/Diff.php
index 6f76278c5a..b122400866 100644
--- a/src/wp-includes/Text/Diff.php
+++ b/src/wp-includes/Text/Diff.php
@@ -10,7 +10,7 @@
  * Copyright 2004-2010 The Horde Project (http://www.horde.org/)
  *
  * See the enclosed file COPYING for license information (LGPL). If you did
- * not receive this file, see http://opensource.org/licenses/lgpl-license.php.
+ * not receive this file, see https://opensource.org/licenses/lgpl-license.php.
  *
  * @package Text_Diff
  * @author  Geoffrey T. Dairiki <dairiki@dairiki.org>
diff --git a/src/wp-includes/Text/Diff/Engine/native.php b/src/wp-includes/Text/Diff/Engine/native.php
index 5824329b7f..2d2003b79b 100644
--- a/src/wp-includes/Text/Diff/Engine/native.php
+++ b/src/wp-includes/Text/Diff/Engine/native.php
@@ -21,7 +21,7 @@
  * Copyright 2004-2010 The Horde Project (http://www.horde.org/)
  *
  * See the enclosed file COPYING for license information (LGPL). If you did
- * not receive this file, see http://opensource.org/licenses/lgpl-license.php.
+ * not receive this file, see https://opensource.org/licenses/lgpl-license.php.
  *
  * @author  Geoffrey T. Dairiki <dairiki@dairiki.org>
  * @package Text_Diff
diff --git a/src/wp-includes/Text/Diff/Engine/shell.php b/src/wp-includes/Text/Diff/Engine/shell.php
index a2ccc70db8..675fc359b1 100644
--- a/src/wp-includes/Text/Diff/Engine/shell.php
+++ b/src/wp-includes/Text/Diff/Engine/shell.php
@@ -8,7 +8,7 @@
  * Copyright 2007-2010 The Horde Project (http://www.horde.org/)
  *
  * See the enclosed file COPYING for license information (LGPL). If you did
- * not receive this file, see http://opensource.org/licenses/lgpl-license.php.
+ * not receive this file, see https://opensource.org/licenses/lgpl-license.php.
  *
  * @author  Milian Wolff <mail@milianw.de>
  * @package Text_Diff
diff --git a/src/wp-includes/Text/Diff/Engine/string.php b/src/wp-includes/Text/Diff/Engine/string.php
index 76a111158c..53e6da7c6c 100644
--- a/src/wp-includes/Text/Diff/Engine/string.php
+++ b/src/wp-includes/Text/Diff/Engine/string.php
@@ -14,7 +14,7 @@
  * Copyright 2005-2010 The Horde Project (http://www.horde.org/)
  *
  * See the enclosed file COPYING for license information (LGPL). If you did
- * not receive this file, see http://opensource.org/licenses/lgpl-license.php.
+ * not receive this file, see https://opensource.org/licenses/lgpl-license.php.
  *
  * @author  Örjan Persson <o@42mm.org>
  * @package Text_Diff
diff --git a/src/wp-includes/Text/Diff/Engine/xdiff.php b/src/wp-includes/Text/Diff/Engine/xdiff.php
index 02ce848078..080e1744b6 100644
--- a/src/wp-includes/Text/Diff/Engine/xdiff.php
+++ b/src/wp-includes/Text/Diff/Engine/xdiff.php
@@ -8,7 +8,7 @@
  * Copyright 2004-2010 The Horde Project (http://www.horde.org/)
  *
  * See the enclosed file COPYING for license information (LGPL). If you did
- * not receive this file, see http://opensource.org/licenses/lgpl-license.php.
+ * not receive this file, see https://opensource.org/licenses/lgpl-license.php.
  *
  * @author  Jon Parise <jon@horde.org>
  * @package Text_Diff
diff --git a/src/wp-includes/Text/Diff/Renderer.php b/src/wp-includes/Text/Diff/Renderer.php
index 712d985a8e..dc8179a93b 100644
--- a/src/wp-includes/Text/Diff/Renderer.php
+++ b/src/wp-includes/Text/Diff/Renderer.php
@@ -8,7 +8,7 @@
  * Copyright 2004-2010 The Horde Project (http://www.horde.org/)
  *
  * See the enclosed file COPYING for license information (LGPL). If you did
- * not receive this file, see http://opensource.org/licenses/lgpl-license.php.
+ * not receive this file, see https://opensource.org/licenses/lgpl-license.php.
  *
  * @package Text_Diff
  */
diff --git a/src/wp-includes/Text/Diff/Renderer/inline.php b/src/wp-includes/Text/Diff/Renderer/inline.php
index 392bd57cff..2acfdaa40d 100644
--- a/src/wp-includes/Text/Diff/Renderer/inline.php
+++ b/src/wp-includes/Text/Diff/Renderer/inline.php
@@ -5,7 +5,7 @@
  * Copyright 2004-2010 The Horde Project (http://www.horde.org/)
  *
  * See the enclosed file COPYING for license information (LGPL). If you did
- * not receive this file, see http://opensource.org/licenses/lgpl-license.php.
+ * not receive this file, see https://opensource.org/licenses/lgpl-license.php.
  *
  * @author  Ciprian Popovici
  * @package Text_Diff