diff --git a/sql.y b/sql.y
index efbb794..e99f9ef 100644
--- a/sql.y
+++ b/sql.y
@@ -3051,6 +3051,7 @@ non_reserved_keyword:
 | GEOMETRY
 | GEOMETRYCOLLECTION
 | GLOBAL
+| GROUPS
 | INT
 | INTEGER
 | ISOLATION
@@ -3097,6 +3098,8 @@ non_reserved_keyword:
 | SPATIAL
 | START
 | STATUS
+| SUBJECT
+| SYSTEM
 | TEXT
 | THAN
 | TIME
diff --git a/token.go b/token.go
index 23efa77..b205fe1 100644
--- a/token.go
+++ b/token.go
@@ -188,6 +188,7 @@ var keywords = map[string]int{
 	"grant":               UNUSED,
 	"group":               GROUP,
 	"group_concat":        GROUP_CONCAT,
+	"groups":              UNUSED,
 	"having":              HAVING,
 	"high_priority":       UNUSED,
 	"hour_microsecond":    UNUSED,
@@ -339,6 +340,8 @@ var keywords = map[string]int{
 	"stored":              UNUSED,
 	"straight_join":       STRAIGHT_JOIN,
 	"stream":              STREAM,
+	"subject":             UNUSED,
+	"system":              UNUSED,
 	"table":               TABLE,
 	"tables":              TABLES,
 	"terminated":          UNUSED,