diff --git a/docs/software_arch.png.license b/docs/software_arch.png.license
new file mode 100644
index 000000000..57abd4c9e
--- /dev/null
+++ b/docs/software_arch.png.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2017-2023 Contributors to the OpenSTEF project <korte.termijn.prognoses@alliander.com>
+
+SPDX-License-Identifier: MPL-2.0