1 files changed, 5 insertions, 0 deletions

diff --git a/README.md b/README.md
index 1377bab..be9edcd 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: 2025 Tomasz Kramkowski <tomasz@kramkow.ski>
+SPDX-License-Identifier: CC-BY-SA-4.0
+-->
+
 # MQTTT
 
 MQTTT (named for "MQTT Tree") is a MQTT router which uses a the structure of a