diff --git a/front_running/README.md b/front_running/README.md
index 2344ed7..aa348f5 100644
--- a/front_running/README.md
+++ b/front_running/README.md
@@ -25,4 +25,4 @@
 
 ### resources
 
-* [ef discussion on random ordering of equally-priced txs](https://github.com/ethereum/go-ethereum/issues/21350)
+