diff --git a/stash/config/config.go b/stash/config/config.go
index e03ce46..09dede8 100644
--- a/stash/config/config.go
+++ b/stash/config/config.go
@@ -17,7 +17,7 @@ type (
 	ElasticSearchConf struct {
 		Hosts         []string
 		Index         string
-		DocType       string `json:",default=doc"`
+		DocType       string `json:",default=_doc"`
 		TimeZone      string `json:",optional"`
 		MaxChunkBytes int    `json:",default=15728640"` // default 15M
 		Compress      bool   `json:",default=false"`
diff --git a/stash/es/writer.go b/stash/es/writer.go
index cbe8eeb..0521fc6 100644
--- a/stash/es/writer.go
+++ b/stash/es/writer.go
@@ -2,6 +2,7 @@ package es
 
 import (
 	"context"
+	"fmt"
 
 	"github.com/kevwan/go-stash/stash/config"
 	"github.com/olivere/elastic/v7"
@@ -10,7 +11,7 @@ import (
 	"github.com/zeromicro/go-zero/core/logx"
 )
 
-const es8Version = "8.0.0"
+const es8Version = "v8.0.0"
 
 type (
 	Writer struct {
@@ -22,7 +23,7 @@ type (
 
 	valueWithIndex struct {
 		index string
-		val   string
+		val   map[string]interface{}
 	}
 )
 
@@ -45,13 +46,13 @@ func NewWriter(c config.ElasticSearchConf) (*Writer, error) {
 	writer := Writer{
 		docType:   c.DocType,
 		client:    client,
-		esVersion: version,
+		esVersion: fmt.Sprintf("v%s", version),
 	}
 	writer.inserter = executors.NewChunkExecutor(writer.execute, executors.WithChunkBytes(c.MaxChunkBytes))
 	return &writer, nil
 }
 
-func (w *Writer) Write(index, val string) error {
+func (w *Writer) Write(index string, val map[string]interface{}) error {
 	return w.inserter.Add(valueWithIndex{
 		index: index,
 		val:   val,
diff --git a/stash/handler/handler.go b/stash/handler/handler.go
index 7da902a..4c23b2f 100644
--- a/stash/handler/handler.go
+++ b/stash/handler/handler.go
@@ -4,6 +4,7 @@ import (
 	jsoniter "github.com/json-iterator/go"
 	"github.com/kevwan/go-stash/stash/es"
 	"github.com/kevwan/go-stash/stash/filter"
+	"time"
 )
 
 type MessageHandler struct {
@@ -37,11 +38,7 @@ func (mh *MessageHandler) Consume(_, val string) error {
 			return nil
 		}
 	}
+	m["timestamp"] = time.Now()
 
-	bs, err := jsoniter.Marshal(m)
-	if err != nil {
-		return err
-	}
-
-	return mh.writer.Write(index, string(bs))
+	return mh.writer.Write(index, m)
 }