diff --git a/gprMax/updates/cpu_updates.py b/gprMax/updates/cpu_updates.py
index 8e64e32e..a7257ad0 100644
--- a/gprMax/updates/cpu_updates.py
+++ b/gprMax/updates/cpu_updates.py
@@ -1,3 +1,21 @@
+# Copyright (C) 2015-2024: The University of Edinburgh, United Kingdom
+#                 Authors: Craig Warren, Antonis Giannopoulos, and John Hartley
+#
+# This file is part of gprMax.
+#
+# gprMax is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# gprMax is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with gprMax.  If not, see <http://www.gnu.org/licenses/>.
+
 from importlib import import_module
 
 from gprMax import config
diff --git a/gprMax/updates/cuda_updates.py b/gprMax/updates/cuda_updates.py
index 1211725c..848b487a 100644
--- a/gprMax/updates/cuda_updates.py
+++ b/gprMax/updates/cuda_updates.py
@@ -1,3 +1,21 @@
+# Copyright (C) 2015-2024: The University of Edinburgh, United Kingdom
+#                 Authors: Craig Warren, Antonis Giannopoulos, and John Hartley
+#
+# This file is part of gprMax.
+#
+# gprMax is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# gprMax is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with gprMax.  If not, see <http://www.gnu.org/licenses/>.
+
 import logging
 from importlib import import_module