diff --git a/src/redis-shake/common/cluster.go b/src/redis-shake/common/cluster.go
index 2abb1e7..870388e 100644
--- a/src/redis-shake/common/cluster.go
+++ b/src/redis-shake/common/cluster.go
@@ -61,6 +61,11 @@ func (cc *ClusterConn) Send(commandName string, args ...interface{}) error {
 
 // send batcher and put the return into recvChan
 func (cc *ClusterConn) Flush() error {
+	if cc.batcher == nil {
+		log.Info("batcher is empty, no need to flush")
+		return nil
+	}
+
 	ret, err := cc.client.RunBatch(cc.batcher)
 	defer func() {
 		cc.batcher = nil // reset batcher
diff --git a/src/vendor/vendor.json b/src/vendor/vendor.json
index 1760128..5a3e3cb 100644
--- a/src/vendor/vendor.json
+++ b/src/vendor/vendor.json
@@ -159,10 +159,10 @@
 			"revisionTime": "2019-03-04T09:57:49Z"
 		},
 		{
-			"checksumSHA1": "1PrwQi6VvhLG4ovw1B7zD/afGZ4=",
+			"checksumSHA1": "qW5Sb6hcZxGHxZbkLoHrCQtYyBs=",
 			"path": "github.com/vinllen/redis-go-cluster",
-			"revision": "0799101ddfdb7d2bc9d47948f8a0cc17d23a216e",
-			"revisionTime": "2019-08-12T11:22:58Z"
+			"revision": "1883b18765aeed1a0b01320791dfe6103aa9a6b6",
+			"revisionTime": "2019-09-04T07:01:13Z"
 		},
 		{
 			"checksumSHA1": "TM3Neoy1xRAKyZYMGzKc41sDFW4=",