diff --git a/common/mux/client_test.go b/common/mux/client_test.go
index 967037c2c..7dc1687e1 100644
--- a/common/mux/client_test.go
+++ b/common/mux/client_test.go
@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/golang/mock/gomock"
+
 	"github.com/v2fly/v2ray-core/v4/common"
 	"github.com/v2fly/v2ray-core/v4/common/errors"
 	"github.com/v2fly/v2ray-core/v4/common/mux"
diff --git a/infra/conf/gun.go b/infra/conf/gun.go
index 905e09432..7f806c860 100644
--- a/infra/conf/gun.go
+++ b/infra/conf/gun.go
@@ -2,6 +2,7 @@ package conf
 
 import (
 	"github.com/golang/protobuf/proto"
+
 	"github.com/v2fly/v2ray-core/v4/transport/internet/grpc"
 )
 
diff --git a/infra/conf/loopback.go b/infra/conf/loopback.go
index 0cdfaf351..23723ed45 100644
--- a/infra/conf/loopback.go
+++ b/infra/conf/loopback.go
@@ -2,6 +2,7 @@ package conf
 
 import (
 	"github.com/golang/protobuf/proto"
+
 	"github.com/v2fly/v2ray-core/v4/proxy/loopback"
 )
 
diff --git a/testing/mocks/dns.go b/testing/mocks/dns.go
index 1961578c4..92c43f6bc 100644
--- a/testing/mocks/dns.go
+++ b/testing/mocks/dns.go
@@ -9,6 +9,7 @@ import (
 	reflect "reflect"
 
 	gomock "github.com/golang/mock/gomock"
+
 	dns "github.com/v2fly/v2ray-core/v4/features/dns"
 )
 
diff --git a/testing/mocks/log.go b/testing/mocks/log.go
index 436d97e7b..ef357e3fb 100644
--- a/testing/mocks/log.go
+++ b/testing/mocks/log.go
@@ -8,6 +8,7 @@ import (
 	reflect "reflect"
 
 	gomock "github.com/golang/mock/gomock"
+
 	log "github.com/v2fly/v2ray-core/v4/common/log"
 )
 
diff --git a/testing/mocks/mux.go b/testing/mocks/mux.go
index e22d78798..d6f1139cc 100644
--- a/testing/mocks/mux.go
+++ b/testing/mocks/mux.go
@@ -8,6 +8,7 @@ import (
 	reflect "reflect"
 
 	gomock "github.com/golang/mock/gomock"
+
 	mux "github.com/v2fly/v2ray-core/v4/common/mux"
 )
 
diff --git a/testing/mocks/outbound.go b/testing/mocks/outbound.go
index ec576b1c8..5c91d757c 100644
--- a/testing/mocks/outbound.go
+++ b/testing/mocks/outbound.go
@@ -9,6 +9,7 @@ import (
 	reflect "reflect"
 
 	gomock "github.com/golang/mock/gomock"
+
 	outbound "github.com/v2fly/v2ray-core/v4/features/outbound"
 )
 
diff --git a/testing/mocks/proxy.go b/testing/mocks/proxy.go
index 0b625fc64..c01239bfc 100644
--- a/testing/mocks/proxy.go
+++ b/testing/mocks/proxy.go
@@ -9,6 +9,7 @@ import (
 	reflect "reflect"
 
 	gomock "github.com/golang/mock/gomock"
+
 	net "github.com/v2fly/v2ray-core/v4/common/net"
 	routing "github.com/v2fly/v2ray-core/v4/features/routing"
 	transport "github.com/v2fly/v2ray-core/v4/transport"
diff --git a/transport/internet/dialer.go b/transport/internet/dialer.go
index 66af2f0e5..aa2f900bb 100644
--- a/transport/internet/dialer.go
+++ b/transport/internet/dialer.go
@@ -2,10 +2,10 @@ package internet
 
 import (
 	"context"
-	"github.com/v2fly/v2ray-core/v4/transport/internet/tagged"
 
 	"github.com/v2fly/v2ray-core/v4/common/net"
 	"github.com/v2fly/v2ray-core/v4/common/session"
+	"github.com/v2fly/v2ray-core/v4/transport/internet/tagged"
 )
 
 // Dialer is the interface for dialing outbound connections.
diff --git a/transport/internet/grpc/dial.go b/transport/internet/grpc/dial.go
index b4a82485e..d3d17c043 100644
--- a/transport/internet/grpc/dial.go
+++ b/transport/internet/grpc/dial.go
@@ -8,16 +8,17 @@ import (
 	"sync"
 	"time"
 
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/backoff"
+	"google.golang.org/grpc/connectivity"
+	"google.golang.org/grpc/credentials"
+
 	"github.com/v2fly/v2ray-core/v4/common"
 	"github.com/v2fly/v2ray-core/v4/common/net"
 	"github.com/v2fly/v2ray-core/v4/common/session"
 	"github.com/v2fly/v2ray-core/v4/transport/internet"
 	"github.com/v2fly/v2ray-core/v4/transport/internet/grpc/encoding"
 	"github.com/v2fly/v2ray-core/v4/transport/internet/tls"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/backoff"
-	"google.golang.org/grpc/connectivity"
-	"google.golang.org/grpc/credentials"
 )
 
 func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
diff --git a/transport/internet/grpc/hub.go b/transport/internet/grpc/hub.go
index c93081c68..e3c27149e 100644
--- a/transport/internet/grpc/hub.go
+++ b/transport/internet/grpc/hub.go
@@ -5,14 +5,15 @@ package grpc
 import (
 	"context"
 
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+
 	"github.com/v2fly/v2ray-core/v4/common"
 	"github.com/v2fly/v2ray-core/v4/common/net"
 	"github.com/v2fly/v2ray-core/v4/common/session"
 	"github.com/v2fly/v2ray-core/v4/transport/internet"
 	"github.com/v2fly/v2ray-core/v4/transport/internet/grpc/encoding"
 	"github.com/v2fly/v2ray-core/v4/transport/internet/tls"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/credentials"
 )
 
 type Listener struct {
diff --git a/transport/internet/tagged/tagged.go b/transport/internet/tagged/tagged.go
index a99a7b88d..a4bfb3e0f 100644
--- a/transport/internet/tagged/tagged.go
+++ b/transport/internet/tagged/tagged.go
@@ -2,6 +2,7 @@ package tagged
 
 import (
 	"context"
+
 	"github.com/v2fly/v2ray-core/v4/common/net"
 )
 
diff --git a/transport/internet/tagged/taggedimpl/impl.go b/transport/internet/tagged/taggedimpl/impl.go
index 6d32be081..9139b0ee2 100644
--- a/transport/internet/tagged/taggedimpl/impl.go
+++ b/transport/internet/tagged/taggedimpl/impl.go
@@ -4,6 +4,7 @@ package taggedimpl
 
 import (
 	"context"
+
 	core "github.com/v2fly/v2ray-core/v4"
 	"github.com/v2fly/v2ray-core/v4/common/net"
 	"github.com/v2fly/v2ray-core/v4/common/session"
diff --git a/v2ray_test.go b/v2ray_test.go
index dcf692a98..df858df62 100644
--- a/v2ray_test.go
+++ b/v2ray_test.go
@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/golang/protobuf/proto"
+
 	. "github.com/v2fly/v2ray-core/v4"
 	"github.com/v2fly/v2ray-core/v4/app/dispatcher"
 	"github.com/v2fly/v2ray-core/v4/app/proxyman"