diff --git a/dbs.go b/dbs.go
index ba859c0..6b6b65b 100644
--- a/dbs.go
+++ b/dbs.go
@@ -78,6 +78,6 @@ func connectMongo() {
 			log.Println("Mongodb connect Error: ", err.Error())
 			os.Exit(-3)
 		}
-		dbs.lc = dbs.mdbDst.DB("dovecot").C("lastlogin_day")
+		dbs.lc = dbs.mdbDst.DB(opts.DstDB).C("lastlogin_day")
 	}
 }
diff --git a/lastlogin_consolidate.go b/lastlogin_consolidate.go
index 97b7e81..6605749 100644
--- a/lastlogin_consolidate.go
+++ b/lastlogin_consolidate.go
@@ -13,7 +13,7 @@ import (
 )
 
 const (
-	_VERSION = "v1.3.6"
+	_VERSION = "v1.3.7"
 	_tformat = "2006-01-02"
 	_24h     = (time.Hour * 23) + (time.Minute * 59) + (time.Second * 59) + (time.Millisecond * 999)
 	_10m     = (time.Minute * 10)
@@ -28,6 +28,7 @@ var (
 		Duration:  _24h,
 		Interval:  _15m,
 		Batch:     10000,
+		DstDB:     "dovecot",
 	}
 
 	wg sync.WaitGroup
diff --git a/options.go b/options.go
index 29a4c0f..62471e8 100644
--- a/options.go
+++ b/options.go
@@ -15,6 +15,7 @@ import (
 type Options struct {
 	MongoSrc  string
 	MongoDst  string
+	DstDB     string
 	StartDate string
 	Duration  time.Duration
 	Interval  time.Duration
@@ -43,11 +44,12 @@ func init() {
 
 	flag.StringVar(&opts.MongoSrc, "ms", opts.MongoSrc, "Mongodb Source")
 	flag.StringVar(&opts.MongoDst, "md", "", "Mongodb Destination")
+	flag.StringVar(&opts.MongoDst, "dd", opts.DstDB, "Database Destination")
 	flag.StringVar(&opts.Influxdb, "I", "", "Influxdb uri")
 	flag.StringVar(&opts.Hostname, "H", "", "Hostname")
 	flag.StringVar(&opts.LogFile, "l", opts.LogFile, "Logs filename")
 	flag.StringVar(&opts.StartDate, "d", opts.StartDate, "Date")
-	flag.DurationVar(&opts.Duration, "dd", opts.Duration, "Duration")
+	flag.DurationVar(&opts.Duration, "du", opts.Duration, "Duration")
 	flag.DurationVar(&opts.Interval, "i", opts.Interval, "Duration")
 	flag.BoolVar(&opts.Version, "v", false, "Version")
 	flag.BoolVar(&opts.Debug, "debug", false, "Debug")