diff --git a/Bluetooth_Lumon_Speaker/Bluetooth_Lumon_Speaker.ino b/Bluetooth_Lumon_Speaker/Bluetooth_Lumon_Speaker.ino
index cef19b546..86a6ee426 100644
--- a/Bluetooth_Lumon_Speaker/Bluetooth_Lumon_Speaker.ino
+++ b/Bluetooth_Lumon_Speaker/Bluetooth_Lumon_Speaker.ino
@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2020 Phil Schatzmann
 //
-// SPDX-License-Identifier: GNU General Public License
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 /*
   Streaming Music from Bluetooth