diff --git a/keywords.md b/keywords.md
index 508dff46b4e74..59b2cac89f2f5 100644
--- a/keywords.md
+++ b/keywords.md
@@ -488,6 +488,7 @@ The following list shows the keywords in TiDB. Reserved keywords are marked with
 - OF (R)
 - OFF
 - OFFSET
+- OLD
 - OLTP_READ_ONLY
 - OLTP_READ_WRITE
 - OLTP_WRITE_ONLY
@@ -595,6 +596,7 @@ The following list shows the keywords in TiDB. Reserved keywords are marked with
 - RESTORES
 - RESTRICT (R)
 - RESUME
+- RETAIN
 - RETURNING
 - REUSE
 - REVERSE