diff --git a/scripts/build_heat_totals.py b/scripts/build_heat_totals.py
index 93e8f9c7..e49ae635 100644
--- a/scripts/build_heat_totals.py
+++ b/scripts/build_heat_totals.py
@@ -1,4 +1,7 @@
 # -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: : 2017-2024 The PyPSA-Eur Authors
+#
+# SPDX-License-Identifier: MIT
 """
 Approximate heat demand for all weather years.
 """
diff --git a/scripts/solve_operations_network_other_year.py b/scripts/solve_operations_network_other_year.py
index f7d8f1e8..91f067cc 100644
--- a/scripts/solve_operations_network_other_year.py
+++ b/scripts/solve_operations_network_other_year.py
@@ -1,4 +1,7 @@
 # -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: : 2017-2024 The PyPSA-Eur Authors
+#
+# SPDX-License-Identifier: MIT
 """
 Solve operations network.
 """
diff --git a/scripts/solve_operations_network_other_year_myopic.py b/scripts/solve_operations_network_other_year_myopic.py
index 5fc8e6be..5858d79f 100644
--- a/scripts/solve_operations_network_other_year_myopic.py
+++ b/scripts/solve_operations_network_other_year_myopic.py
@@ -1,4 +1,7 @@
 # -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: : 2017-2024 The PyPSA-Eur Authors
+#
+# SPDX-License-Identifier: MIT
 """
 Solve myopic operations network.
 """