diff --git a/client/grpc/grpc.go b/client/grpc/grpc.go
index e755eb6..e4ff34f 100644
--- a/client/grpc/grpc.go
+++ b/client/grpc/grpc.go
@@ -6,24 +6,23 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"fmt"
-	"google.golang.org/grpc/credentials/insecure"
 	"net"
 	"os"
 	"time"
 
 	grpcretry "github.com/grpc-ecosystem/go-grpc-middleware/retry"
 	"github.com/pkg/errors"
+	"github.com/s7techlab/hlf-sdk-go/api/config"
+	"github.com/s7techlab/hlf-sdk-go/client/grpc/opencensus/hlf"
 	"go.opencensus.io/plugin/ocgrpc"
 	"go.opencensus.io/trace"
 	"go.uber.org/zap"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/insecure"
 	"google.golang.org/grpc/keepalive"
 	"google.golang.org/grpc/resolver"
 	"google.golang.org/grpc/resolver/manual"
-
-	"github.com/s7techlab/hlf-sdk-go/api/config"
-	"github.com/s7techlab/hlf-sdk-go/client/grpc/opencensus/hlf"
 )
 
 var (