diff --git a/index.bs b/index.bs
index cba1446e6..c93ce4896 100644
--- a/index.bs
+++ b/index.bs
@@ -13,6 +13,7 @@ Status: ED
 Prepare for TR: true
 TR: https://www.w3.org/TR/webauthn/
 ED: https://w3c.github.io/webauthn/
+Previous Version: https://www.w3.org/TR/2018/CR-webauthn-20180807/
 Previous Version: https://www.w3.org/TR/2018/CR-webauthn-20180320/
 Previous Version: https://www.w3.org/TR/2018/WD-webauthn-20180315/
 Previous Version: https://www.w3.org/TR/2018/WD-webauthn-20180306/