diff --git a/CMakeLists.txt b/CMakeLists.txt
index 089e145..8d770c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2023 John Watts and the LuminaSensum contributors
+
 cmake_minimum_required(VERSION 3.25)
 
 # Initialize Mbed OS build system
diff --git a/README.md b/README.md
index c71ef80..6f08fa8 100644
--- a/README.md
+++ b/README.md
@@ -36,4 +36,8 @@
 
 ## License
 
+Copyright: 2023 Casey Reeves <casey.reeves@lumina-sensum.com>
+Copyright: 2023 John Watts <john.watts@lumina-sensum.com>
+SPDX-License-Identifier: MIT
+
 All documentation and software for this project is under the MIT license unless otherwise specified.
diff --git a/include/ButtonThread.h b/include/ButtonThread.h
index bb50412..5d3a2d9 100644
--- a/include/ButtonThread.h
+++ b/include/ButtonThread.h
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #ifndef BUTTONTHREAD_H
 #define BUTTONTHREAD_H
 
diff --git a/include/Filesystem.h b/include/Filesystem.h
index cbe7453..d03d952 100644
--- a/include/Filesystem.h
+++ b/include/Filesystem.h
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #ifndef FILESYSTEM_H
 #define FILESYSTEM_H
 
diff --git a/include/FlashErase.h b/include/FlashErase.h
index db2857b..cab4d7c 100644
--- a/include/FlashErase.h
+++ b/include/FlashErase.h
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #ifndef FLASHERASE_H
 #define FLASHERASE_H
 
diff --git a/include/MainBD.h b/include/MainBD.h
index a9161e0..2846b96 100644
--- a/include/MainBD.h
+++ b/include/MainBD.h
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #ifndef MAINBD_H
 #define MAINBD_H
 
diff --git a/include/MainFilesystem.h b/include/MainFilesystem.h
index 28a521d..568793d 100644
--- a/include/MainFilesystem.h
+++ b/include/MainFilesystem.h
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #ifndef MAINFILESYSTEM_H
 #define MAINFILESYSTEM_H
 
diff --git a/include/MyUSBMSD.h b/include/MyUSBMSD.h
index 54e9785..1ee05ce 100644
--- a/include/MyUSBMSD.h
+++ b/include/MyUSBMSD.h
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #ifndef MYUSBMSD_H
 #define MYUSBMSD_H
 
diff --git a/scripts/build.sh b/scripts/build.sh
index 05ae53d..120832a 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2023 John Watts and the LuminaSensum contributors
+
 set -e
 if ! test -e .boardserial; then
 	echo "Please run scripts/findboard.sh!"
diff --git a/scripts/check.sh b/scripts/check.sh
index 1e730f9..da629dc 100755
--- a/scripts/check.sh
+++ b/scripts/check.sh
@@ -1,3 +1,6 @@
 #!/bin/bash
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2023 John Watts and the LuminaSensum contributors
+
 set -e
 clang-format -i src/* include/*
diff --git a/scripts/findboard.sh b/scripts/findboard.sh
index f8321a5..7162711 100755
--- a/scripts/findboard.sh
+++ b/scripts/findboard.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2023 John Watts and the LuminaSensum contributors
+
 set -e
 SERIALPATH="$PWD/.boardserial"
 USBDIR=/sys/bus/usb/devices
diff --git a/scripts/serial.sh b/scripts/serial.sh
index b742650..7c7aff5 100755
--- a/scripts/serial.sh
+++ b/scripts/serial.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2023 John Watts and the LuminaSensum contributors
+
 set -e
 if ! test -e .boardserial; then
         echo "Please run scripts/findboard.sh!"
diff --git a/scripts/setup-udev.sh b/scripts/setup-udev.sh
index aac5997..3f6f3ad 100755
--- a/scripts/setup-udev.sh
+++ b/scripts/setup-udev.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2023 John Watts and the LuminaSensum contributors
+
 set -e
 RULES=/etc/udev/rules.d/60-stlink.rules
 test -e /etc/udev/rules.d/60-stlink.rules && exit 0
diff --git a/src/ButtonThread.cpp b/src/ButtonThread.cpp
index 4ab76a2..bc20282 100644
--- a/src/ButtonThread.cpp
+++ b/src/ButtonThread.cpp
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 John Watts and the LuminaSensum contributors
+*/
+
 #include "ButtonThread.h"
 #include "mbed.h"
 
diff --git a/src/Filesystem.cpp b/src/Filesystem.cpp
index 96b1aa7..029423b 100644
--- a/src/Filesystem.cpp
+++ b/src/Filesystem.cpp
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #include "Filesystem.h"
 #include "MainBD.h"
 #include "mbed.h"
diff --git a/src/FlashErase.cpp b/src/FlashErase.cpp
index 9ee65b5..f772fd9 100644
--- a/src/FlashErase.cpp
+++ b/src/FlashErase.cpp
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #include "FlashErase.h"
 #include "mbed.h"
 #include <errno.h>
diff --git a/src/MainBD.cpp b/src/MainBD.cpp
index 987d9e3..0c3bd0a 100644
--- a/src/MainBD.cpp
+++ b/src/MainBD.cpp
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #if !DEVICE_QSPI
 #error[NOT_SUPPORTED] QSPI not supported for this target
 #endif
diff --git a/src/MainFilesystem.cpp b/src/MainFilesystem.cpp
index 74f7218..bbca88a 100644
--- a/src/MainFilesystem.cpp
+++ b/src/MainFilesystem.cpp
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #include "MainFilesystem.h"
 #include "mbed.h"
 
diff --git a/src/MyUSBMSD.cpp b/src/MyUSBMSD.cpp
index 4403cf8..0b23a56 100644
--- a/src/MyUSBMSD.cpp
+++ b/src/MyUSBMSD.cpp
@@ -1,3 +1,8 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+*/
+
 #include "MyUSBMSD.h"
 #include "ButtonThread.h"
 #include "Filesystem.h"
diff --git a/src/main.cpp b/src/main.cpp
index 39512dd..2c834bb 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,3 +1,9 @@
+/*
+SPDX-License-Identifier: MIT
+Copyright (c) 2023 Casey Reeves and the LuminaSensum contributors
+Copyright (c) 2023 John Watts and the LuminaSensum contributors
+*/
+
 #include "ButtonThread.h"
 #include "Filesystem.h"
 #include "FlashErase.h"