diff --git a/debian/changelog b/debian/changelog
index b77c33c..03611ae 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,7 @@
 qtxdg-tools (3.12.0-0ubuntu1) noble; urgency=medium
 
   * New upstream release.
+  * Update copyright file.
 
  -- Aaron Rainbolt <arraybolt3@gmail.com>  Sun, 05 Nov 2023 15:25:31 -0600
 
diff --git a/debian/copyright b/debian/copyright
index 3c33b22..8c409d5 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -3,13 +3,18 @@ Upstream-Name: qtxdg-tools
 Source: https://github.com/lxqt/qtxdg-tools
 
 Files: *
-Copyright: 2018-2021 Luís Pereira <luis.artur.pereira@gmail.com>
-           2020-2022 LXQt team
+Copyright: 2020-2023 LXQt team
+License: LGPL-2.1
+
+Files: src/mat/*.cpp
+       src/mat/*.h
+Copyright: 2018-2021 Luis Pereira <luis.artur.pereira@gmail.com>
 License: LGPL-2.1+
 
 Files: debian/*
-Copyright: 2022 Andrew Lee <ajqlee@debian.org>
-           2023 Lubuntu Developers <lubuntu-devel@lists.ubuntu.com>
+Copyright: 2022      Andrew Lee <ajqlee@debian.org>
+           2022-2023 Simon Quigley <tsimonq2@ubuntu.com>
+           2022-2023 Aaron Rainbolt <arraybolt3@gmail.com>
 License: LGPL-2.1+
 
 License: LGPL-2.1+
@@ -25,3 +30,17 @@ License: LGPL-2.1+
  .
  On Debian systems, the complete text of the GNU Lesser General
  Public License version 2.1 can be found in "/usr/share/common-licenses/LGPL-2.1".
+
+License: LGPL-2.1
+ This program or library is free software; you can redistribute it
+ and/or modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation, version 2.1
+ of the License.
+ .
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+ .
+ On Debian systems, the complete text of the GNU Lesser General
+ Public License version 2.1 can be found in "/usr/share/common-licenses/LGPL-2.1".