diff --git a/src/pkg/immutabletag/dao/immutable.go b/src/pkg/immutabletag/dao/immutable.go
index 7450c5514..e7e338348 100644
--- a/src/pkg/immutabletag/dao/immutable.go
+++ b/src/pkg/immutabletag/dao/immutable.go
@@ -65,7 +65,7 @@ func (i *immutableRuleDao) GetImmutableRule(id int64) (*model.ImmutableRule, err
 func (i *immutableRuleDao) QueryImmutableRuleByProjectID(projectID int64) ([]model.ImmutableRule, error) {
 	o := dao.GetOrmer()
 	qs := o.QueryTable(&model.ImmutableRule{}).Filter("ProjectID", projectID)
-	var r []model.ImmutableRule
+	r := make([]model.ImmutableRule, 0)
 	_, err := qs.All(&r)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get immutable tag rule by projectID %d, error: %v", projectID, err)
diff --git a/src/pkg/immutabletag/manager.go b/src/pkg/immutabletag/manager.go
index b78911c9f..167e00726 100644
--- a/src/pkg/immutabletag/manager.go
+++ b/src/pkg/immutabletag/manager.go
@@ -79,7 +79,7 @@ func (drm *defaultRuleManager) QueryImmutableRuleByProjectID(projectID int64) ([
 	if err != nil {
 		return nil, err
 	}
-	var rules []model.Metadata
+	rules := make([]model.Metadata, 0)
 	for _, daoRule := range daoRules {
 		rule := model.Metadata{}
 		if err = json.Unmarshal([]byte(daoRule.TagFilter), &rule); err != nil {