diff --git a/docs/design-decisions.md b/docs/design-decisions.md
index 8354046d..4c557b1a 100644
--- a/docs/design-decisions.md
+++ b/docs/design-decisions.md
@@ -132,7 +132,7 @@ Because of the first reason, there were not advantages by using typeclasses
 compared to using records. This situation of wrapping a typeclass in an
 existential is referred to as _"Existential Typeclass Anti Pattern"_. For
 example,
-[here](https://lukepalmer.wordpress.com/2010/01/24/haskell-antipattern-existential-typeclass).
+[here](https://web.archive.org/web/20201109041924/http://lukepalmer.wordpress.com/2010/01/24/haskell-antipattern-existential-typeclass/).
 
 ## Why do you use lawless typeclasses for combinators?