diff --git a/pkg/edition/java/proto/packet/customreportdetails.go b/pkg/edition/java/proto/packet/customreportdetails.go
new file mode 100644
index 00000000..acf48b69
--- /dev/null
+++ b/pkg/edition/java/proto/packet/customreportdetails.go
@@ -0,0 +1,35 @@
+package packet
+
+import (
+	protoutil "go.minekube.com/gate/pkg/edition/java/proto/util"
+	"go.minekube.com/gate/pkg/gate/proto"
+	"io"
+)
+
+type CustomReportDetails struct {
+	Details map[string]string
+}
+
+func (p *CustomReportDetails) Encode(c *proto.PacketContext, wr io.Writer) error {
+	w := protoutil.PanicWriter(wr)
+	w.VarInt(len(p.Details))
+	for key, value := range p.Details {
+		w.String(key)
+		w.String(value)
+	}
+	return nil
+}
+
+func (p *CustomReportDetails) Decode(c *proto.PacketContext, rd io.Reader) (err error) {
+	r := protoutil.PanicReader(rd)
+	var detailsCount int
+	r.VarInt(&detailsCount)
+	p.Details = make(map[string]string, detailsCount)
+	for i := 0; i < detailsCount; i++ {
+		var key, value string
+		r.String(&key)
+		r.String(&value)
+		p.Details[key] = value
+	}
+	return
+}
diff --git a/pkg/edition/java/proto/packet/login.go b/pkg/edition/java/proto/packet/login.go
index e24d523a..9e017686 100644
--- a/pkg/edition/java/proto/packet/login.go
+++ b/pkg/edition/java/proto/packet/login.go
@@ -338,7 +338,7 @@ func (s *ServerLoginSuccess) Encode(c *proto.PacketContext, wr io.Writer) (err e
 			return err
 		}
 	}
-	if c.Protocol.GreaterEqual(version.Minecraft_1_20_5) {
+	if c.Protocol == version.Minecraft_1_20_5.Protocol || c.Protocol == version.Minecraft_1_21.Protocol {
 		err = util.WriteBool(wr, serverLoginSuccessStrictErrorHandling)
 		if err != nil {
 			return err
@@ -380,7 +380,7 @@ func (s *ServerLoginSuccess) Decode(c *proto.PacketContext, rd io.Reader) (err e
 			return
 		}
 	}
-	if c.Protocol.GreaterEqual(version.Minecraft_1_20_5) {
+	if c.Protocol == version.Minecraft_1_20_5.Protocol || c.Protocol == version.Minecraft_1_21.Protocol {
 		_, err = util.ReadBool(rd)
 		if err != nil {
 			return
diff --git a/pkg/edition/java/proto/packet/serverlinks.go b/pkg/edition/java/proto/packet/serverlinks.go
new file mode 100644
index 00000000..567a4ba5
--- /dev/null
+++ b/pkg/edition/java/proto/packet/serverlinks.go
@@ -0,0 +1,75 @@
+package packet
+
+import (
+	"go.minekube.com/gate/pkg/edition/java/proto/packet/chat"
+	protoutil "go.minekube.com/gate/pkg/edition/java/proto/util"
+	"go.minekube.com/gate/pkg/gate/proto"
+	"io"
+)
+
+type ServerLinks struct {
+	ServerLinks []*ServerLink
+}
+
+func (p *ServerLinks) Encode(c *proto.PacketContext, wr io.Writer) error {
+	w := protoutil.PanicWriter(wr)
+	w.VarInt(len(p.ServerLinks))
+	for _, serverLink := range p.ServerLinks {
+		err := serverLink.Encode(c, wr)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (p *ServerLinks) Decode(c *proto.PacketContext, rd io.Reader) (err error) {
+	r := protoutil.PanicReader(rd)
+	var serverLinksCount int
+	r.VarInt(&serverLinksCount)
+	p.ServerLinks = make([]*ServerLink, serverLinksCount)
+	for i := 0; i < serverLinksCount; i++ {
+		p.ServerLinks[i] = new(ServerLink)
+		err = p.ServerLinks[i].Decode(c, rd)
+		if err != nil {
+			return err
+		}
+	}
+	return
+}
+
+type ServerLink struct {
+	ID          int
+	DisplayName chat.ComponentHolder
+	URL         string
+}
+
+func (p *ServerLink) Encode(c *proto.PacketContext, wr io.Writer) error {
+	if p.ID >= 0 {
+		protoutil.PWriteBool(wr, true)
+		protoutil.PWriteVarInt(wr, p.ID)
+	} else {
+		protoutil.PWriteBool(wr, false)
+		err := p.DisplayName.Write(wr, c.Protocol)
+		if err != nil {
+			return err
+		}
+	}
+	return protoutil.WriteString(wr, p.URL)
+}
+
+func (p *ServerLink) Decode(c *proto.PacketContext, rd io.Reader) (err error) {
+	r := protoutil.PanicReader(rd)
+	if r.Ok() {
+		r.VarInt(&p.ID)
+		r.String(&p.URL)
+	} else {
+		p.ID = -1
+		p.DisplayName, err = chat.ReadComponentHolderNP(rd, c.Protocol)
+		if err != nil {
+			return err
+		}
+		r.String(&p.URL)
+	}
+	return
+}
diff --git a/pkg/edition/java/proto/state/register.go b/pkg/edition/java/proto/state/register.go
index 0db14f70..8001230e 100644
--- a/pkg/edition/java/proto/state/register.go
+++ b/pkg/edition/java/proto/state/register.go
@@ -111,6 +111,12 @@ func init() {
 	Config.ClientBound.Register(&config.KnownPacks{},
 		m(0x0E, version.Minecraft_1_20_5),
 	)
+	Config.ClientBound.Register(&p.CustomReportDetails{},
+		m(0x0F, version.Minecraft_1_21),
+	)
+	Config.ClientBound.Register(&p.ServerLinks{},
+		m(0x10, version.Minecraft_1_21),
+	)
 
 	Login.ServerBound.Register(&p.ServerLogin{},
 		m(0x00, version.Minecraft_1_7_2))
@@ -530,4 +536,10 @@ func init() {
 	Play.ClientBound.Register(&p.Transfer{},
 		m(0x73, version.Minecraft_1_20_5),
 	)
+	Play.ClientBound.Register(&p.CustomReportDetails{},
+		m(0x7A, version.Minecraft_1_21),
+	)
+	Play.ClientBound.Register(&p.ServerLinks{},
+		m(0x7B, version.Minecraft_1_21),
+	)
 }
diff --git a/pkg/edition/java/proto/version/version.go b/pkg/edition/java/proto/version/version.go
index b7cb78e7..5440750c 100644
--- a/pkg/edition/java/proto/version/version.go
+++ b/pkg/edition/java/proto/version/version.go
@@ -44,6 +44,7 @@ var (
 	Minecraft_1_20_2 = v(764, "1.20.2")
 	Minecraft_1_20_3 = v(765, "1.20.3", "1.20.4")
 	Minecraft_1_20_5 = v(766, "1.20.5", "1.20.6")
+	Minecraft_1_21   = v(767, "1.21")
 
 	// Versions ordered from lowest to highest
 	Versions = []*proto.Version{
@@ -63,6 +64,7 @@ var (
 		Minecraft_1_18, Minecraft_1_18_2,
 		Minecraft_1_19, Minecraft_1_19_1, Minecraft_1_19_3, Minecraft_1_19_4,
 		Minecraft_1_20, Minecraft_1_20_2, Minecraft_1_20_3, Minecraft_1_20_5,
+		Minecraft_1_21,
 	}
 )