diff --git a/backend/cmd/migration.go b/backend/cmd/migration.go
index 66b0158..df57af0 100644
--- a/backend/cmd/migration.go
+++ b/backend/cmd/migration.go
@@ -78,15 +78,15 @@ func migrateClientSchema(db *gorm.DB) error {
 					switch cname {
 					case "inbounds":
 						inbounds := strings.Split(data.Data, ",")
-						newData, _ = json.MarshalIndent(inbounds, " ", "  ")
+						newData, _ = json.MarshalIndent(inbounds, "", "  ")
 					case "config":
 						jsonData := map[string]interface{}{}
 						json.Unmarshal([]byte(data.Data), &jsonData)
-						newData, _ = json.MarshalIndent(jsonData, " ", "  ")
+						newData, _ = json.MarshalIndent(jsonData, "", "  ")
 					case "links":
 						jsonData := make([]interface{}, 0)
 						json.Unmarshal([]byte(data.Data), &jsonData)
-						newData, _ = json.MarshalIndent(jsonData, " ", "  ")
+						newData, _ = json.MarshalIndent(jsonData, "", "  ")
 					}
 					err = db.Model(model.Client{}).Where("id = ?", data.Id).UpdateColumn(cname, newData).Error
 					if err != nil {
diff --git a/backend/service/config.go b/backend/service/config.go
index c5f4e51..dd31a69 100644
--- a/backend/service/config.go
+++ b/backend/service/config.go
@@ -248,7 +248,7 @@ func (s *ConfigService) Save(singboxConfig *SingBoxConfig) error {
 		return err
 	}
 
-	data, err := json.MarshalIndent(singboxConfig, " ", "  ")
+	data, err := json.MarshalIndent(singboxConfig, "", "  ")
 	if err != nil {
 		return err
 	}
diff --git a/backend/sub/jsonService.go b/backend/sub/jsonService.go
index 291c936..a7c331c 100644
--- a/backend/sub/jsonService.go
+++ b/backend/sub/jsonService.go
@@ -79,7 +79,7 @@ func (j *JsonService) GetJson(subId string, format string) (*string, error) {
 	// Add other objects from settings
 	j.addOthers(&jsonConfig)
 
-	result, _ := json.MarshalIndent(jsonConfig, " ", "  ")
+	result, _ := json.MarshalIndent(jsonConfig, "", "  ")
 	resultStr := string(result)
 	return &resultStr, nil
 }