diff --git a/about.md b/about.md
index 86544dc..a288bc6 100644
--- a/about.md
+++ b/about.md
@@ -1,6 +1,6 @@
 # About the Book: 100 Go Mistakes and How to Avoid Them
 
-https://www.manning.com/books/100-go-mistakes-and-how-to-avoid-them (-35% with **au35har**)
+https://www.manning.com/books/100-go-mistakes-and-how-to-avoid-them (-35% with the code **au35har**)
 
 Spot errors in your Go code you didn’t even know you were making and boost your productivity by avoiding common mistakes and pitfalls.