diff --git a/2020/ferguson1/README.md b/2020/ferguson1/README.md
index 67876c773..d00bccbe9 100644
--- a/2020/ferguson1/README.md
+++ b/2020/ferguson1/README.md
@@ -543,7 +543,7 @@ programmers. I'm especially proud to win besides Dave Burton and Yusuke Endoh
 but Don Yang and Edward Giles too.
 
 But there are some others who I don't remember like [Ilya
-Kurdyukov](../../authors.html#https://en.wikipedia.org/wiki/Signals_intelligence#World_War_II)
+Kurdyukov](../../authors.html#Ilya_Kurdyukov)
 (who's offered a lot of interesting thoughts on [Snake](../ferguson1/prog.c) and
 who plans to have his own version after the entries are published), [Nathan
 Otterness](../../authors.html#Nathan_Otterness), [Nicholas
diff --git a/2020/ferguson1/index.html b/2020/ferguson1/index.html
index 5189c9cd0..962cb4228 100644
--- a/2020/ferguson1/index.html
+++ b/2020/ferguson1/index.html
@@ -588,7 +588,7 @@ Burton</a>, <a href="../../authors.html#Yusuke_Endoh">Yusuke Endoh</a>
 and <a href="../../authors.html#Edward_Giles">Edward Giles</a> all of whom are amazing
 programmers. I’m especially proud to win besides Dave Burton and Yusuke Endoh
 but Don Yang and Edward Giles too.</p>
-<p>But there are some others who I don’t remember like <a href="../../authors.html#https://en.wikipedia.org/wiki/Signals_intelligence#World_War_II">Ilya
+<p>But there are some others who I don’t remember like <a href="../../authors.html#Ilya_Kurdyukov">Ilya
 Kurdyukov</a>
 (who’s offered a lot of interesting thoughts on <a href="../ferguson1/prog.c">Snake</a> and
 who plans to have his own version after the entries are published), <a href="../../authors.html#Nathan_Otterness">Nathan