diff --git a/Adafruit_ESP32_Arduino_Demos/ESP32_sleeptest/ESP32_sleeptest.ino b/Adafruit_ESP32_Arduino_Demos/ESP32_sleeptest/ESP32_sleeptest.ino
index 657b77460..4331fb4ff 100644
--- a/Adafruit_ESP32_Arduino_Demos/ESP32_sleeptest/ESP32_sleeptest.ino
+++ b/Adafruit_ESP32_Arduino_Demos/ESP32_sleeptest/ESP32_sleeptest.ino
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2022 Limor Fried for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
 #include <Adafruit_NeoPixel.h>
 
 #if defined(PIN_NEOPIXEL)