diff --git a/bip-0154.mediawiki b/bip-0154.mediawiki
index cf8f9562..8e647879 100644
--- a/bip-0154.mediawiki
+++ b/bip-0154.mediawiki
@@ -166,7 +166,7 @@ Solution format:
 Additional notes:
 
 * The initial nonce value used for finding a graph with a suitable solution should be randomized, or a challenger may deliberately pick a challenge with "poor" outcomes to fool a node into spending more than predicted time solving.
-* Further information on the recommended challenge parameters can be found here: http://bc-2.jp/cuckoo-profile.pdf
+* Further information on the recommended challenge parameters can be found here: https://web.archive.org/web/20230207054058/http://bc-2.jp/cuckoo-profile.pdf
 
 ===Purpose Identifiers===