diff --git a/bip-hugonguyen-bsms.mediawiki b/bip-hugonguyen-bsms.mediawiki
index f0e7abd3..bcde6400 100644
--- a/bip-hugonguyen-bsms.mediawiki
+++ b/bip-hugonguyen-bsms.mediawiki
@@ -45,7 +45,7 @@ Concerns #4 and #5 should be handled by Signers and are out of scope of this pro
 ===Prerequisites===
 This proposal assumes the parties in the multisig support [https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki BIP-0032], [https://github.com/bitcoin/bips/blob/master/bip-0322.mediawiki BIP-0322], [https://github.com/bitcoin/bitcoin/blob/master/doc/descriptors.md the descriptor language] and [https://tools.ietf.org/html/rfc3686 AES encryption].
 
-===File Extension===
+===File Extensions===
 All descriptor and key records should have a <tt>.bsms</tt> file extension. Encrypted data should have a <tt>.dat</tt> extension.
 
 ===Roles===