diff --git a/README.md b/README.md
index c229260..b9e7331 100644
--- a/README.md
+++ b/README.md
@@ -4,9 +4,13 @@ Taiwan Ground Motion Model and Ground-Motion Database
 
 # Update note
 
+## SSHAC_GM_V7_20170919
+
+- [#21](/../../issues/21) Update the Vs30 of MTN stations in Chi-Chi event. (9 records)
+
 ## SSHAC_GM_V7_20170918
 
-- Fix #20 EQ: 1995_0223_0519_03 (Pfile:02230518.P95) (EQSN:038) only have 21 records
+- Fix  [#20](/../../issues/20) EQ: 1995_0223_0519_03 (Pfile:02230518.P95) (EQSN:038) only have 21 records
 
 ## SSHAC_GM_V7_20170802