diff --git a/internal/transport/grpc/grpc.go b/internal/transport/grpc/grpc.go
index b6a4e8b..7d2a79f 100644
--- a/internal/transport/grpc/grpc.go
+++ b/internal/transport/grpc/grpc.go
@@ -2,8 +2,9 @@ package db
 
 import (
 	"context"
-	"fmt"
 	"log"
+	"net"
+	"strconv"
 
 	"git.slaventius.ru/test3k/auth/internal/config"
 
@@ -20,8 +21,8 @@ type AuthDBClient struct {
 }
 
 func NewDBClient(ctx context.Context, config *config.Config) *AuthDBClient {
-	connStr := fmt.Sprintf("%s:%d", config.Db.Host, config.Db.Port)
-	client, err := grpc.Dial(connStr, grpc.WithInsecure())
+	conStr := net.JoinHostPort(config.Db.Host, strconv.Itoa(config.Db.Port))
+	client, err := grpc.Dial(conStr, grpc.WithInsecure())
 	if err != nil {
 		log.Fatal(err)
 	}