diff --git a/NOTICE b/COPYING
similarity index 64%
rename from NOTICE
rename to COPYING
index cec4fb6..03496a7 100644
--- a/NOTICE
+++ b/COPYING
@@ -8,3 +8,13 @@ and Carl Worth. Menu transparency was implemented by Dana Jansens.
 Numerous contributions to compton from Richard Grenville.
 
 See the CONTRIBUTORS file for a complete list of contributors
+
+This source code is provided under:
+
+	SPDX-License-Identifier: MPL-2.0 AND MIT
+
+And the preferred license for new source files in this project is:
+
+	SPDX-License-Identifier: MPL-2.0
+
+You can find the text of the licenses in the LICENSES directory.
diff --git a/LICENSE.spdx b/LICENSE.spdx
new file mode 100644
index 0000000..f0aa2e9
--- /dev/null
+++ b/LICENSE.spdx
@@ -0,0 +1,4 @@
+SPDXVersion: SPDX-2.1
+DataLicense: CC0-1.0
+PackageName: compton
+PackageLicenseDeclared: MPL-2.0 AND MIT
diff --git a/LICENSE-mit b/LICENSES/MIT
similarity index 100%
rename from LICENSE-mit
rename to LICENSES/MIT
diff --git a/LICENSE b/LICENSES/MPL-2.0
similarity index 100%
rename from LICENSE
rename to LICENSES/MPL-2.0