diff --git a/pkg/config/etcd_source.go b/pkg/config/etcd_source.go
index 05769dd01a..79136b91bf 100644
--- a/pkg/config/etcd_source.go
+++ b/pkg/config/etcd_source.go
@@ -133,7 +133,7 @@ func (es *EtcdSource) refreshConfigurations() error {
 
 	ctx, cancel := context.WithTimeout(es.ctx, ReadConfigTimeout)
 	defer cancel()
-	response, err := es.etcdCli.Get(ctx, prefix, clientv3.WithPrefix())
+	response, err := es.etcdCli.Get(ctx, prefix, clientv3.WithPrefix(), clientv3.WithSerializable())
 	if err != nil {
 		return err
 	}