diff --git a/docs/src/bin/keyfork/wizard/index.md b/docs/src/bin/keyfork/wizard/index.md
index 68fc6e8..943a819 100644
--- a/docs/src/bin/keyfork/wizard/index.md
+++ b/docs/src/bin/keyfork/wizard/index.md
@@ -63,3 +63,5 @@ shardholder.
 
 An OpenPGP-encrypted Shard file, if not previously configured to be written to
 a file using `--output`.
+
+[BIP-0032]: https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki