diff --git a/http3/error_codes.go b/http3/error_codes.go
index 67b215d8..e8428d0a 100644
--- a/http3/error_codes.go
+++ b/http3/error_codes.go
@@ -26,7 +26,7 @@ const (
 	ErrCodeMessageError         ErrCode = 0x10e
 	ErrCodeConnectError         ErrCode = 0x10f
 	ErrCodeVersionFallback      ErrCode = 0x110
-	ErrCodeDatagramError        ErrCode = 0x4a1268
+	ErrCodeDatagramError        ErrCode = 0x33
 )
 
 func (e ErrCode) String() string {
diff --git a/http3/frames.go b/http3/frames.go
index cdd97bc5..454e5f94 100644
--- a/http3/frames.go
+++ b/http3/frames.go
@@ -88,7 +88,7 @@ func (f *headersFrame) Append(b []byte) []byte {
 	return quicvarint.Append(b, f.Length)
 }
 
-const settingDatagram = 0xffd277
+const settingDatagram = 0x33
 
 type settingsFrame struct {
 	Datagram bool
diff --git a/http3/roundtrip.go b/http3/roundtrip.go
index 066b762b..bed42103 100644
--- a/http3/roundtrip.go
+++ b/http3/roundtrip.go
@@ -52,7 +52,7 @@ type RoundTripper struct {
 
 	// Enable support for HTTP/3 datagrams.
 	// If set to true, QuicConfig.EnableDatagram will be set.
-	// See https://www.ietf.org/archive/id/draft-schinazi-masque-h3-datagram-02.html.
+	// See https://datatracker.ietf.org/doc/html/rfc9297.
 	EnableDatagrams bool
 
 	// Additional HTTP/3 settings.
diff --git a/http3/server.go b/http3/server.go
index b90c850c..728811c0 100644
--- a/http3/server.go
+++ b/http3/server.go
@@ -176,7 +176,7 @@ type Server struct {
 
 	// EnableDatagrams enables support for HTTP/3 datagrams.
 	// If set to true, QuicConfig.EnableDatagram will be set.
-	// See https://datatracker.ietf.org/doc/html/draft-ietf-masque-h3-datagram-07.
+	// See https://datatracker.ietf.org/doc/html/rfc9297.
 	EnableDatagrams bool
 
 	// MaxHeaderBytes controls the maximum number of bytes the server will