diff --git a/keyboard/gnap/pcb/readme.md b/keyboard/gnap/pcb/readme.md
index f20dfe4f..ad3f66e9 100644
--- a/keyboard/gnap/pcb/readme.md
+++ b/keyboard/gnap/pcb/readme.md
@@ -14,3 +14,6 @@ EasyEDA ordering info:
 
     Added Mini USB connector
     Added mounting holes
+
+Gerber files released under https://creativecommons.org/licenses/by-sa/4.0/
+![Creative Commons Attribution-ShareAlike 4.0 International License](https://i.creativecommons.org/l/by-sa/4.0/88x31.png)