diff --git a/README.md b/README.md
index e0035d3..9ed425e 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@ $ git clone https://github.com/invite-frey/is-woo-payment-fps.git
 
 ## Acknowledgements
 
+* Inspiration for the FPS EMV string generation from https://github.com/nessgor/fps-hk-qrcode
 * The QR codes are generated by [PHP QR Code](https://sourceforge.net/projects/phpqrcode/), which is included under the terms of its [license](https://sourceforge.net/p/phpqrcode/git/ci/master/tree/LICENSE). 
 
 ## Versioning