diff --git a/common/buf/sing.go b/common/buf/sing.go
index f86b5755..c176ecb1 100644
--- a/common/buf/sing.go
+++ b/common/buf/sing.go
@@ -9,10 +9,12 @@ const BufferSize = buf.BufferSize
 
 type Buffer = buf.Buffer
 
-var New = buf.New
-var StackNew = buf.StackNew
-var StackNewSize = buf.StackNewSize
-var With = buf.With
+var (
+	New          = buf.New
+	StackNew     = buf.StackNew
+	StackNewSize = buf.StackNewSize
+	With         = buf.With
+)
 
 var KeepAlive = common.KeepAlive
 
@@ -21,5 +23,7 @@ func Dup[T any](obj T) T {
 	return common.Dup(obj)
 }
 
-var Must = common.Must
-var Error = common.Error
+var (
+	Must  = common.Must
+	Error = common.Error
+)
diff --git a/common/convert/converter.go b/common/convert/converter.go
index abd07a94..b67918db 100644
--- a/common/convert/converter.go
+++ b/common/convert/converter.go
@@ -5,10 +5,11 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
-	"github.com/Dreamacro/clash/log"
 	"net/url"
 	"strconv"
 	"strings"
+
+	"github.com/Dreamacro/clash/log"
 )
 
 // ConvertsV2Ray convert V2Ray subscribe proxies data to clash proxies config
@@ -201,7 +202,8 @@ func ConvertsV2Ray(buf []byte) ([]map[string]any, error) {
 				vmess["servername"] = sni
 			}
 
-			network := strings.ToLower(values["net"].(string))
+			network, _ := values["net"].(string)
+			network = strings.ToLower(network)
 			if values["type"] == "http" {
 				network = "http"
 			} else if network == "http" {
@@ -209,9 +211,12 @@ func ConvertsV2Ray(buf []byte) ([]map[string]any, error) {
 			}
 			vmess["network"] = network
 
-			tls := strings.ToLower(values["tls"].(string))
-			if strings.HasSuffix(tls, "tls") {
-				vmess["tls"] = true
+			tls, ok := values["tls"].(string)
+			if ok {
+				tls = strings.ToLower(tls)
+				if strings.HasSuffix(tls, "tls") {
+					vmess["tls"] = true
+				}
 			}
 
 			switch network {