diff --git a/client/client.go b/client/client.go
index 478e180d..5137eee6 100644
--- a/client/client.go
+++ b/client/client.go
@@ -76,7 +76,7 @@ type QQClient struct {
 	transCache             *utils.Cache
 	lastLostMsg            string
 	groupMsgBuilders       sync.Map
-	onlinePushCache        []int16 // reset on reconnect
+	onlinePushCache        *utils.Cache
 	requestPacketRequestId int32
 	groupSeq               int32
 	friendSeq              int32
@@ -170,6 +170,7 @@ func NewClientMd5(uin int64, passwordMd5 [16]byte) *QQClient {
 		eventHandlers:          &eventHandlers{},
 		msgSvcCache:            utils.NewCache(time.Second * 15),
 		transCache:             utils.NewCache(time.Second * 15),
+		onlinePushCache:        utils.NewCache(time.Second * 15),
 		version:                genVersionInfo(SystemDeviceInfo.Protocol),
 		servers: []*net.TCPAddr{ // default servers
 			{IP: net.IP{42, 81, 169, 46}, Port: 8080},
@@ -946,7 +947,6 @@ func (c *QQClient) connect() error {
 	c.retryTimes = 0
 	c.ConnectTime = time.Now()
 	c.Conn = conn
-	c.onlinePushCache = []int16{}
 	return nil
 }
 
diff --git a/client/decoders.go b/client/decoders.go
index c9cf3dba..aa67ba0d 100644
--- a/client/decoders.go
+++ b/client/decoders.go
@@ -693,19 +693,12 @@ func decodeOnlinePushReqPacket(c *QQClient, seq uint16, payload []byte) (interfa
 	uin := jr.ReadInt64(0)
 	jr.ReadSlice(&msgInfos, 2)
 	_ = c.send(c.buildDeleteOnlinePushPacket(uin, seq, msgInfos))
-	seqExists := func(ms int16) bool {
-		for _, s := range c.onlinePushCache {
-			if ms == s {
-				return true
-			}
-		}
-		return false
-	}
 	for _, m := range msgInfos {
-		if seqExists(m.MsgSeq) {
+		k := fmt.Sprintf("%v%v%v", m.MsgSeq, m.MsgTime, m.MsgUid)
+		if _, ok := c.onlinePushCache.Get(k); ok {
 			continue
 		}
-		c.onlinePushCache = append(c.onlinePushCache, m.MsgSeq)
+		c.onlinePushCache.Add(k, "", time.Second*30)
 		if m.MsgType == 732 {
 			r := binary.NewReader(m.VMsg)
 			groupId := int64(uint32(r.ReadInt32()))