diff --git a/client/builders.go b/client/builders.go
index 6263a555..16a2507d 100644
--- a/client/builders.go
+++ b/client/builders.go
@@ -6,6 +6,8 @@ import (
 	"math/rand"
 	"strconv"
 
+	"github.com/golang/protobuf/proto"
+
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/binary/jce"
 	"github.com/Mrs4s/MiraiGo/client/pb"
@@ -20,7 +22,6 @@ import (
 	"github.com/Mrs4s/MiraiGo/protocol/packets"
 	"github.com/Mrs4s/MiraiGo/protocol/tlv"
 	"github.com/Mrs4s/MiraiGo/utils"
-	"github.com/golang/protobuf/proto"
 )
 
 var (
@@ -846,6 +847,16 @@ func (c *QQClient) buildGroupNameUpdatePacket(groupCode int64, newName string) (
 	return c.buildGroupOperationPacket(body)
 }
 
+func (c *QQClient) buildGroupMemoUpdatePacket(groupCode int64, newMemo string) (uint16, []byte) {
+	body := &oidb.D89AReqBody{
+		GroupCode: groupCode,
+		StGroupInfo: &oidb.D89AGroupinfo{
+			IngGroupMemo: []byte(newMemo),
+		},
+	}
+	return c.buildGroupOperationPacket(body)
+}
+
 // OidbSvc.0x89a_0
 func (c *QQClient) buildGroupMuteAllPacket(groupCode int64, mute bool) (uint16, []byte) {
 	body := &oidb.D89AReqBody{
diff --git a/client/client.go b/client/client.go
index 042dcaad..4ce88c1c 100644
--- a/client/client.go
+++ b/client/client.go
@@ -16,6 +16,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/golang/protobuf/proto"
+
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/client/pb/longmsg"
 	"github.com/Mrs4s/MiraiGo/client/pb/msg"
@@ -23,7 +25,6 @@ import (
 	"github.com/Mrs4s/MiraiGo/message"
 	"github.com/Mrs4s/MiraiGo/protocol/packets"
 	"github.com/Mrs4s/MiraiGo/utils"
-	"github.com/golang/protobuf/proto"
 )
 
 type QQClient struct {
@@ -754,6 +755,10 @@ func (c *QQClient) updateGroupName(groupCode int64, newName string) {
 	_, _ = c.sendAndWait(c.buildGroupNameUpdatePacket(groupCode, newName))
 }
 
+func (c *QQClient) updateGroupMemo(groupCode int64, newMemo string) {
+	_, _ = c.sendAndWait(c.buildGroupMemoUpdatePacket(groupCode, newMemo))
+}
+
 func (c *QQClient) groupMuteAll(groupCode int64, mute bool) {
 	_, _ = c.sendAndWait(c.buildGroupMuteAllPacket(groupCode, mute))
 }
diff --git a/client/entities.go b/client/entities.go
index 582ebdf9..6b8456e2 100644
--- a/client/entities.go
+++ b/client/entities.go
@@ -208,6 +208,13 @@ func (g *GroupInfo) UpdateName(newName string) {
 	}
 }
 
+func (g *GroupInfo) UpdateMemo(newMemo string) {
+	if g.AdministratorOrOwner() {
+		g.client.updateGroupMemo(g.Code, newMemo)
+		g.Memo = newMemo
+	}
+}
+
 func (g *GroupInfo) MuteAll(mute bool) {
 	if g.AdministratorOrOwner() {
 		g.client.groupMuteAll(g.Code, mute)