diff --git a/src/Application.vala b/src/Application.vala
index 0c85f8d5..58c02a40 100644
--- a/src/Application.vala
+++ b/src/Application.vala
@@ -1,21 +1,7 @@
 /*
-* Copyright 2016-2021 elementary, Inc. (https://elementary.io)
-*
-* 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 2 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, write to the
-* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-* Boston, MA 02110-1301 USA.
-*/
+ * Copyright 2016-2024 elementary, Inc. (https://elementary.io)
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
 
 public class Captive.Application : Gtk.Application {
     private string? debug_url = null;
diff --git a/src/MainWindow.vala b/src/MainWindow.vala
index 5f0029ad..ca0ffb44 100644
--- a/src/MainWindow.vala
+++ b/src/MainWindow.vala
@@ -1,22 +1,7 @@
 /*
-* Copyright 2015-2023 elementary, Inc. (https://elementary.io)
-*
-* 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 2 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, write to the
-* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-* Boston, MA 02110-1301 USA.
-*
-*/
+ * Copyright 2015-2024 elementary, Inc. (https://elementary.io)
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
 
 public class Captive.MainWindow : Gtk.ApplicationWindow {
     private const string DUMMY_URL = "http://capnet.elementary.io";
diff --git a/src/TabbedWebView.vala b/src/TabbedWebView.vala
index 63195178..1a9639a0 100644
--- a/src/TabbedWebView.vala
+++ b/src/TabbedWebView.vala
@@ -1,22 +1,7 @@
 /*
-* Copyright 2016-2023 elementary, Inc. (https://elementary.io)
-*
-* 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 2 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, write to the
-* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-* Boston, MA 02110-1301 USA.
-*
-*/
+ * Copyright 2016-2024 elementary, Inc. (https://elementary.io)
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
 
 public class Captive.TabbedWebView : WebKit.WebView {
     public bool load_cookies { get; construct; }