From a41df7dd7e08bfe2c076af8744edd1a3676a3a19 Mon Sep 17 00:00:00 2001
From: shoopea <shoopea@siteop.biz>
Date: Mon, 6 Jan 2020 12:05:19 +0800
Subject: [PATCH] fix

---
 rules.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/rules.go b/rules.go
index 1482a8b..cfa2d3d 100644
--- a/rules.go
+++ b/rules.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"encoding/json"
+	"errors"
 	"log"
 	"regexp"
 )