diff --git a/.gitignore b/.gitignore
index c44bdfd0d92555a537e5021e593dde7114933160..1d12f02fa2a09d5c96627c4056f9ca98751fc856 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2012-2017 Bruce Cowan <bruce@bcowan.me.uk>
 #
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: CC0-1.0
 
 .flatpak*
 
diff --git a/data/uk.me.bcowan.Rugby.desktop b/data/uk.me.bcowan.Rugby.desktop
index 679b1e4d88a1e1057a7cb8b1edb35cc385b1443e..db96ee0e20cafb398d0eebc9c3d9ea70fcdf2b6f 100644
--- a/data/uk.me.bcowan.Rugby.desktop
+++ b/data/uk.me.bcowan.Rugby.desktop
@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2020-2021 Bruce Cowan <bruce@bcowan.me.uk>
 #
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: CC0-1.0
 
 [Desktop Entry]
 Name=Rugby
diff --git a/data/uk.me.bcowan.Rugby.gresource.xml b/data/uk.me.bcowan.Rugby.gresource.xml
index f399ea72690fda1d6dabc63ae0aea5b957bfec49..7beb3492126a65a30025487d43dd736f7fc99d6e 100644
--- a/data/uk.me.bcowan.Rugby.gresource.xml
+++ b/data/uk.me.bcowan.Rugby.gresource.xml
@@ -2,7 +2,7 @@
 <!--
   SPDX-FileCopyrightText: 2012-2023 Bruce Cowan <bruce@bcowan.me.uk>
 
-  SPDX-License-Identifier: GPL-3.0-or-later
+  SPDX-License-Identifier: CC0-1.0
 -->
 <gresources>
   <gresource prefix="/uk/me/bcowan/Rugby">
diff --git a/data/uk.me.bcowan.Rugby.metainfo.xml b/data/uk.me.bcowan.Rugby.metainfo.xml
index b2004c1f337fb1751ee45d0615d9e45e304f570e..991af4d6199bf8e817a687f369722de62eaf64da 100644
--- a/data/uk.me.bcowan.Rugby.metainfo.xml
+++ b/data/uk.me.bcowan.Rugby.metainfo.xml
@@ -3,7 +3,7 @@
 <!--
 SPDX-FileCopyrightText: 2023-2024 Bruce Cowan
 
-SPDX-License-Identifier: GPL-3.0-or-later
+SPDX-License-Identifier: CC0-1.0
 -->
 
 <component type="desktop-application">
@@ -13,7 +13,7 @@ SPDX-License-Identifier: GPL-3.0-or-later
   <developer_name>Bruce Cowan</developer_name>
   <summary>Find possibilities for rugby scores</summary>
 
-  <metadata_license>CC-BY-SA-4.0</metadata_license>
+  <metadata_license>CC0-1.0</metadata_license>
   <project_license>GPL-3.0-or-later</project_license>
 
   <description>