diff --git a/doc.go b/doc.go
index 5b8a4b9..6c2ab76 100644
--- a/doc.go
+++ b/doc.go
@@ -4,7 +4,7 @@
 
 // Package uuid generates and inspects UUIDs.
 //
-// UUIDs are based on RFC 4122 and DCE 1.1: Authentication and Security
+// UUIDs are based on RFC 9562(obsoletes RFC 4122) and DCE 1.1: Authentication and Security
 // Services.
 //
 // A UUID is a 16 byte (128 bit) array.  UUIDs may be used as keys to
diff --git a/hash.go b/hash.go
index 35338cd..d3bc00a 100644
--- a/hash.go
+++ b/hash.go
@@ -38,7 +38,7 @@ func NewHash(h hash.Hash, space UUID, data []byte, version int) UUID {
 	var uuid UUID
 	copy(uuid[:], s)
 	uuid[6] = (uuid[6] & 0x0f) | uint8((version&0xf)<<4)
-	uuid[8] = (uuid[8] & 0x3f) | 0x80 // RFC 4122 variant
+	uuid[8] = (uuid[8] & 0x3f) | 0x80 // RFC 9562 variant
 	return uuid
 }
 
diff --git a/uuid.go b/uuid.go
index 5232b48..b745bac 100644
--- a/uuid.go
+++ b/uuid.go
@@ -16,7 +16,7 @@ import (
 )
 
 // A UUID is a 128 bit (16 byte) Universal Unique IDentifier as defined in RFC
-// 4122.
+// 9562.
 type UUID [16]byte
 
 // A Version represents a UUID's version.
@@ -28,12 +28,17 @@ type Variant byte
 // Constants returned by Variant.
 const (
 	Invalid   = Variant(iota) // Invalid UUID
-	RFC4122                   // The variant specified in RFC4122
+	RFC4122                   // The variant specified in RFC9562(obsoletes RFC4122).
 	Reserved                  // Reserved, NCS backward compatibility.
 	Microsoft                 // Reserved, Microsoft Corporation backward compatibility.
 	Future                    // Reserved for future definition.
 )
 
+// RFC9562 added V6 and V7 of UUID, but did not change specification of V1 and V4
+// implemented in this module. To avoid creating new major module version,
+// we still use RFC4122 for constant name.
+const Standard = RFC4122
+
 const randPoolSize = 16 * 16
 
 var (
@@ -57,7 +62,7 @@ func IsInvalidLengthError(err error) bool {
 }
 
 // Parse decodes s into a UUID or returns an error if it cannot be parsed.  Both
-// the standard UUID forms defined in RFC 4122
+// the standard UUID forms defined in RFC 9562
 // (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx and
 // urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx) are decoded.  In addition,
 // Parse accepts non-standard strings such as the raw hex encoding