diff --git a/README.md b/README.md
index daa4440..9ef7d6b 100644
--- a/README.md
+++ b/README.md
@@ -192,7 +192,7 @@ Linear Data Manual, 1988.
 
 [uSDX]: https://github.com/threeme3/usdx
 
-[uSDX Sketch]: QCX-SSB.ino
+[uSDX Sketch]: usdx.ino
 
 [hex file]: https://github.com/threeme3/usdx/releases
 
@@ -296,4 +296,3 @@ Linear Data Manual, 1988.
 
 [R1.00]: https://github.com/threeme3/usdx/tree/0a90ce8afdbbcdafb89cc13261a38b9f99067a66
 
-