diff --git a/charts/vald/values.yaml b/charts/vald/values.yaml
index bd16c485b3..09770d3f14 100644
--- a/charts/vald/values.yaml
+++ b/charts/vald/values.yaml
@@ -1374,7 +1374,7 @@ agent:
       auto_backup_duration: 10m
       # @schema {"name": "agent.sidecar.config.post_stop_timeout", "type": "string"}
       # agent.sidecar.config.post_stop_timeout -- timeout duration for file changing during post stop
-      post_stop_timeout: 10s
+      post_stop_timeout: 20s
       # @schema {"name": "agent.sidecar.config.filename", "type": "string"}
       # agent.sidecar.config.filename -- backup filename
       filename: _MY_POD_NAME_
diff --git a/pkg/agent/sidecar/service/observer/observer.go b/pkg/agent/sidecar/service/observer/observer.go
index 3fa16ef46a..3f15ac1626 100644
--- a/pkg/agent/sidecar/service/observer/observer.go
+++ b/pkg/agent/sidecar/service/observer/observer.go
@@ -159,10 +159,19 @@ func (o *observer) PostStop(ctx context.Context) (err error) {
 		return err
 	}
 
-	_, err = o.w.Start(ctx)
+	wctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	_, err = o.w.Start(wctx)
 	if err != nil {
 		return err
 	}
+	defer func() {
+		e := o.w.Stop(wctx)
+		if e != nil {
+			log.Error("an error occurred when watcher stopped:", e)
+		}
+	}()
 
 	for {
 		select {
diff --git a/pkg/agent/sidecar/service/observer/option.go b/pkg/agent/sidecar/service/observer/option.go
index 04c36e9ccd..61ebe56b09 100644
--- a/pkg/agent/sidecar/service/observer/option.go
+++ b/pkg/agent/sidecar/service/observer/option.go
@@ -29,7 +29,7 @@ var (
 	defaultOpts = []Option{
 		WithErrGroup(errgroup.Get()),
 		WithBackupDuration("10m"),
-		WithPostStopTimeout("10s"),
+		WithPostStopTimeout("20s"),
 	}
 )