diff --git a/CMakeLists.txt b/CMakeLists.txt
index b96683c..e0ea095 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,18 +1,7 @@
-# Copyright (C) 2008 by Volker Lanz <vl@fidra.de>
-# Copyright (C) 2014-2019 by Andrius Štikonas <andrius@stikonas.eu>
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; either version 3 of
-# the License, or (at your option) any later version.
-#
-# This program 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 General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-FileCopyrightText: 2008 Volker Lanz <vl@fidra.de>
+# SPDX-FileCopyrightText: 2014-2020 Andrius Štikonas <andrius@stikonas.eu>
+
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 project(partitionmanager)
 
diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 5180d7c..4d6dc85 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -1 +1,6 @@
+# SPDX-FileCopyrightText: 2008 Volker Lanz <vl@fidra.de>
+# SPDX-FileCopyrightText: 2015 Andrius Štikonas <andrius@stikonas.eu>
+
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 kdoctools_create_handbook( index.docbook  INSTALL_DESTINATION ${HTML_INSTALL_DIR}/en SUBDIR partitionmanager )
diff --git a/icons/CMakeLists.txt b/icons/CMakeLists.txt
index 689a8c2..dfe2ce5 100644
--- a/icons/CMakeLists.txt
+++ b/icons/CMakeLists.txt
@@ -1 +1,6 @@
+# SPDX-FileCopyrightText: 2009 Volker Lanz <vl@fidra.de>
+# SPDX-FileCopyrightText: 2014-2017 Andrius Štikonas <andrius@stikonas.eu>
+
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 ecm_install_icons(ICONS sc-apps-partitionmanager.svg DESTINATION ${KDE_INSTALL_ICONDIR})
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 01a14f8..939d29e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,19 +1,7 @@
-# Copyright (C) 2008, 2012 by Volker Lanz <vl@fidra.de>
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; either version 3 of
-# the License, or (at your option) any later version.
-#
-# This program 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 General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-FileCopyrightText: 2008 Volker Lanz <vl@fidra.de>
+# SPDX-FileCopyrightText: 2014-2020 Andrius Štikonas <andrius@stikonas.eu>
 
-############################################
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 include(config/CMakeLists.txt)
 include(gui/CMakeLists.txt)
diff --git a/src/config/CMakeLists.txt b/src/config/CMakeLists.txt
index e0f57ca..87b1ae2 100644
--- a/src/config/CMakeLists.txt
+++ b/src/config/CMakeLists.txt
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2015 Chris Campbell <c.j.campbell@ed.ac.uk>
+
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 set(CONFIG_SRC
 	config/advancedpagewidget.cpp
 	config/configureoptionsdialog.cpp
diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
index 02705f4..c122bf0 100644
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -1,3 +1,10 @@
+# SPDX-FileCopyrightText: 2015 Andrius Štikonas <andrius@stikonas.eu>
+# SPDX-FileCopyrightText: 2015 Chris Campbell <c.j.campbell@ed.ac.uk>
+# SPDX-FileCopyrightText: 2015 Teo Mrnjavac <teo@kde.org>
+# SPDX-FileCopyrightText: 2016 Chantara Tith <tith.chantara@gmail.com>
+
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 set(GUI_SRC
     gui/applyprogressdetailswidget.cpp
     gui/applyprogressdialog.cpp
diff --git a/src/util/CMakeLists.txt b/src/util/CMakeLists.txt
index d85d3b4..878ae7f 100644
--- a/src/util/CMakeLists.txt
+++ b/src/util/CMakeLists.txt
@@ -1,3 +1,8 @@
+# SPDX-FileCopyrightText: 2015 Andrius Štikonas <andrius@stikonas.eu>
+# SPDX-FileCopyrightText: 2015 Chris Campbell <c.j.campbell@ed.ac.uk>
+
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 set(UTIL_SRC
 	util/guihelpers.cpp
 )