diff --git a/pkg/bbgo/config.go b/pkg/bbgo/config.go
index b0af22268..9cdb79fc1 100644
--- a/pkg/bbgo/config.go
+++ b/pkg/bbgo/config.go
@@ -7,7 +7,6 @@ import (
 	"io/ioutil"
 	"reflect"
 	"runtime"
-	"time"
 
 	"github.com/pkg/errors"
 	"gopkg.in/yaml.v3"
@@ -167,7 +166,7 @@ type SyncConfig struct {
 	Symbols []string `json:"symbols,omitempty" yaml:"symbols,omitempty"`
 
 	// Since is the date where you want to start syncing data
-	Since *time.Time `json:"since,omitempty"`
+	Since *types.LooseFormatTime `json:"since,omitempty"`
 }
 
 type Config struct {
diff --git a/pkg/cmd/sync.go b/pkg/cmd/sync.go
index c0e1ff925..c9f0a4fc9 100644
--- a/pkg/cmd/sync.go
+++ b/pkg/cmd/sync.go
@@ -78,7 +78,7 @@ var SyncCmd = &cobra.Command{
 		var syncStartTime = defaultSyncStartTime
 
 		if userConfig.Sync != nil && userConfig.Sync.Since != nil {
-			syncStartTime = *userConfig.Sync.Since
+			syncStartTime = userConfig.Sync.Since.Time()
 		}
 
 		if len(since) > 0 {