diff --git a/LICENSE.spdx b/LICENSE.spdx
new file mode 100644
index 0000000..37c5475
--- /dev/null
+++ b/LICENSE.spdx
@@ -0,0 +1,7 @@
+SPDXVersion: SPDX-2.1
+DataLicense: CC0-1.0
+PackageName: alpine-linux-headless-bootstrap
+PackageOriginator: macmpi
+PackageHomePage: https://github.com/macmpi/alpine-linux-headless-bootstrap
+PackageLicenseDeclared: MIT
+
diff --git a/headless.apkovl.tar.gz b/headless.apkovl.tar.gz
index 9fbe550..125f818 100644
Binary files a/headless.apkovl.tar.gz and b/headless.apkovl.tar.gz differ
diff --git a/make.sh b/make.sh
index 53963d4..eb2fd62 100755
--- a/make.sh
+++ b/make.sh
@@ -1,3 +1,6 @@
+# Copyright 2022 - 2023, macmpi
+# SPDX-License-Identifier: MIT
+
 #!/bin/sh
 
 chmod 600 overlay/etc/ssh/ssh_host_*_key
diff --git a/overlay/etc/local.d/headless.start b/overlay/etc/local.d/headless.start
index 3959f5e..53ad9f8 100755
--- a/overlay/etc/local.d/headless.start
+++ b/overlay/etc/local.d/headless.start
@@ -1,3 +1,6 @@
+# Copyright 2022 - 2023, macmpi
+# SPDX-License-Identifier: MIT
+
 #!/bin/sh
 
 VERSION="0.6"
diff --git a/overlay/etc/modprobe.d/g_ether.conf b/overlay/etc/modprobe.d/g_ether.conf
index b161bba..a3fa924 100644
--- a/overlay/etc/modprobe.d/g_ether.conf
+++ b/overlay/etc/modprobe.d/g_ether.conf
@@ -1,3 +1,6 @@
+# Copyright 2022 - 2023, macmpi
+# SPDX-License-Identifier: MIT
+
 # added to support USB-Ethernet gadget mode at boot for Pi devices
 
 options g_ether dev_addr=ea:64:2f:e8:19:94 host_addr=f6:67:ce:b3:c0:ea
diff --git a/overlay/etc/modules-load.d/g_ether.conf b/overlay/etc/modules-load.d/g_ether.conf
index e5456e0..a9b7ea2 100644
--- a/overlay/etc/modules-load.d/g_ether.conf
+++ b/overlay/etc/modules-load.d/g_ether.conf
@@ -1,3 +1,6 @@
+# Copyright 2022 - 2023, macmpi
+# SPDX-License-Identifier: MIT
+
 # added to support USB-Ethernet gadget mode at boot for Pi devices
 # also requires dtoverlay=dwc2 is added to usercfg.txt or config.txt
 
diff --git a/sample_interfaces b/sample_interfaces
index eefd4ef..e3f9acc 100644
--- a/sample_interfaces
+++ b/sample_interfaces
@@ -1,3 +1,6 @@
+# Copyright 2022 - 2023, macmpi
+# SPDX-License-Identifier: MIT
+
 # Sample network interfaces file
 
 auto lo
diff --git a/sample_unattended.sh b/sample_unattended.sh
index b0cb3bf..da71075 100644
--- a/sample_unattended.sh
+++ b/sample_unattended.sh
@@ -1,3 +1,6 @@
+# Copyright 2022 - 2023, macmpi
+# SPDX-License-Identifier: MIT
+
 #/bin/sh
 
 ## collection of few code snippets as sample unnatteded actions some may find usefull
diff --git a/sample_wpa_supplicant.conf b/sample_wpa_supplicant.conf
index 021f3e4..ba349e1 100644
--- a/sample_wpa_supplicant.conf
+++ b/sample_wpa_supplicant.conf
@@ -1,3 +1,6 @@
+# Copyright 2022 - 2023, macmpi
+# SPDX-License-Identifier: MIT
+
 # Sample wpa_supplicant.conf
 country=FR