diff --git a/bip-0032.mediawiki b/bip-0032.mediawiki
index 8a953f85..b851e8fa 100644
--- a/bip-0032.mediawiki
+++ b/bip-0032.mediawiki
@@ -33,7 +33,7 @@ However, deterministic wallets typically consist of a single "chain" of keypairs
 
 ===Conventions===
 
-In the rest of this text we will assume the public key cryptography used in Bitcoin, namely elliptic curve cryptography using the field and curve parameters defined by secp256k1 (http://www.secg.org/index.php?action=secg,docs_secg). Variables below are either:
+In the rest of this text we will assume the public key cryptography used in Bitcoin, namely elliptic curve cryptography using the field and curve parameters defined by secp256k1 (http://www.secg.org/sec2-v2.pdf). Variables below are either:
 * Integers modulo the order of the curve (referred to as n).
 * Coordinates of points on the curve.
 * Byte sequences.