diff --git a/devutils/update_lists.py b/devutils/update_lists.py
index b0c08fa5..8837a471 100755
--- a/devutils/update_lists.py
+++ b/devutils/update_lists.py
@@ -1,8 +1,13 @@
 #!/usr/bin/env python3
 
+# Copyright 2025 The Helium Authors
+# You can use, redistribute, and/or modify this source code under
+# the terms of the GPL-3.0 license that can be found in the LICENSE file.
+
 # Copyright (c) 2019 The ungoogled-chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
+
 """
 Update binary pruning and domain substitution lists automatically.
 
diff --git a/devutils/update_platform_patches.py b/devutils/update_platform_patches.py
index ea5b8b30..af29715e 100755
--- a/devutils/update_platform_patches.py
+++ b/devutils/update_platform_patches.py
@@ -1,9 +1,14 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
+# Copyright 2025 The Helium Authors
+# You can use, redistribute, and/or modify this source code under
+# the terms of the GPL-3.0 license that can be found in the LICENSE file.
+
 # Copyright (c) 2019 The ungoogled-chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
+
 """
 Utility to ease the updating of platform patches against ungoogled-chromium's patches
 """
diff --git a/utils/domain_substitution.py b/utils/domain_substitution.py
index c7813cc3..146cd907 100755
--- a/utils/domain_substitution.py
+++ b/utils/domain_substitution.py
@@ -1,9 +1,14 @@
 #!/usr/bin/env python3
 # -*- coding: UTF-8 -*-
 
+# Copyright 2025 The Helium Authors
+# You can use, redistribute, and/or modify this source code under
+# the terms of the GPL-3.0 license that can be found in the LICENSE file.
+
 # Copyright (c) 2019 The ungoogled-chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
+
 """
 Substitute domain names in the source tree with blockable strings.
 """