diff --git a/src/rai_hmi/rai_hmi/voice_hmi.py b/src/rai_hmi/rai_hmi/voice_hmi.py
index db2921f4..36418598 100644
--- a/src/rai_hmi/rai_hmi/voice_hmi.py
+++ b/src/rai_hmi/rai_hmi/voice_hmi.py
@@ -1,3 +1,18 @@
+# Copyright (C) 2024 Robotec.AI
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 from rclpy.callback_groups import ReentrantCallbackGroup
 from std_msgs.msg import String