diff --git a/Code/uLisp/README.md b/Code/uLisp/README.md
index 75be005..91c7fba 100644
--- a/Code/uLisp/README.md
+++ b/Code/uLisp/README.md
@@ -79,3 +79,7 @@ It should be noted that uLisp's default serial port speed is **9600**
 ## Pre-compiled uf2
 https://github.com/clockworkpi/PicoCalc/blob/master/Bin/PicoCalc%20SD/firmware/PicoCalc_uLisp_v1.0.uf2
 
+# Official uLisp for PicoCalc
+
+https://github.com/technoblogy/ulisp-picocalc
+