diff --git a/adafruitio-adt7410/adafruitio-adt7410.ino b/adafruitio-adt7410/adafruitio-adt7410.ino
index 735d5af2e..27d071b7e 100644
--- a/adafruitio-adt7410/adafruitio-adt7410.ino
+++ b/adafruitio-adt7410/adafruitio-adt7410.ino
@@ -1,6 +1,6 @@
-# SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
-#
-# SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
 
 // Adafruit IO ADT7410 Example
 //
@@ -175,4 +175,4 @@ void loop()
   {
     delay(1000);
   }
-}
\ No newline at end of file
+}
diff --git a/adafruitio-temp-motion-wing/adafruitio-temp-motion-wing.ino b/adafruitio-temp-motion-wing/adafruitio-temp-motion-wing.ino
index 2d43dcbe0..56c7d1ea8 100644
--- a/adafruitio-temp-motion-wing/adafruitio-temp-motion-wing.ino
+++ b/adafruitio-temp-motion-wing/adafruitio-temp-motion-wing.ino
@@ -1,6 +1,6 @@
-# SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
-#
-# SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
 
 // Adafruit IO - Analog Devices ADT7410 + ADXL343 Example
 //
diff --git a/adalogger/adalogger.ino b/adalogger/adalogger.ino
index 7b6a1f3ae..9272b4702 100644
--- a/adalogger/adalogger.ino
+++ b/adalogger/adalogger.ino
@@ -1,6 +1,6 @@
-# SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
-#
-# SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
 
 #include <SPI.h>
 #include <SD.h>
@@ -75,4 +75,4 @@ void loop() {
   digitalWrite(8, LOW);
   
   delay(100);
-}
\ No newline at end of file
+}
diff --git a/color_touch_pendant/color_touch_pendant.ino b/color_touch_pendant/color_touch_pendant.ino
index 95d56ef0d..1c4fdfdce 100644
--- a/color_touch_pendant/color_touch_pendant.ino
+++ b/color_touch_pendant/color_touch_pendant.ino
@@ -1,6 +1,6 @@
-# SPDX-FileCopyrightText: 2018 Erin St. Blaine for Adafruit Industries
-#
-# SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2018 Erin St. Blaine for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
 
 // Code by Erin St. Blaine for Adafruit Industries
 // Color Touch Pendant Tutorial: https://learn.adafruit.com/color-touch-pendant-necklace/introduction
diff --git a/fauxmo_guide/fauxmo-basic/fauxmo-basic.ino b/fauxmo_guide/fauxmo-basic/fauxmo-basic.ino
index b59b89df7..0fd25c69f 100644
--- a/fauxmo_guide/fauxmo-basic/fauxmo-basic.ino
+++ b/fauxmo_guide/fauxmo-basic/fauxmo-basic.ino
@@ -1,6 +1,6 @@
-# SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
-#
-# SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
 
 #include <Arduino.h>
 #include <ESP8266WiFi.h>
diff --git a/fauxmo_guide/fauxmo-relay-neopixel/fauxmo-relay-neopixel.ino b/fauxmo_guide/fauxmo-relay-neopixel/fauxmo-relay-neopixel.ino
index 7b7f1c4c8..8dda0ceda 100644
--- a/fauxmo_guide/fauxmo-relay-neopixel/fauxmo-relay-neopixel.ino
+++ b/fauxmo_guide/fauxmo-relay-neopixel/fauxmo-relay-neopixel.ino
@@ -1,6 +1,6 @@
-# SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
-#
-# SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
 
 #include <Arduino.h>
 #include <Adafruit_NeoPixel.h>
@@ -143,4 +143,4 @@ uint32_t Wheel(byte WheelPos)
     WheelPos -= 170;
     return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
   }
-}
\ No newline at end of file
+}
diff --git a/neoMatrixMkI/neoMatrixMkI.ino b/neoMatrixMkI/neoMatrixMkI.ino
index 388e002fb..ce32cb90d 100644
--- a/neoMatrixMkI/neoMatrixMkI.ino
+++ b/neoMatrixMkI/neoMatrixMkI.ino
@@ -1,6 +1,6 @@
-# SPDX-FileCopyrightText: 2017 John Park for Adafruit Industries
-#
-# SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2017 John Park for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
 
 #include "Arduino.h"
 #include "Keypad.h"