diff --git a/src/services/File.ts b/src/services/File.ts
index 62c6f71..18cf91b 100644
--- a/src/services/File.ts
+++ b/src/services/File.ts
@@ -62,7 +62,7 @@ export function checkQrExists(gameId: string, version: string, shop: string) {
  * @return {Promise<string | Buffer | (string | Buffer)[]>}
  */
 export function generateCouponImg(shop: string, couponId: string, content: string) {
-  let subPath = `/coupon/${shop}/`
+  let subPath = `/coupon/${shop}`
   let path = generateUploadPath(subPath)
   let file =  `${path}/${couponId}.png`
   if (content.search(/meta name=.+?viewport/) === -1) {
@@ -85,6 +85,6 @@ export function generateCouponImg(shop: string, couponId: string, content: strin
 }
 
 export function getCouponUrl(shop: string, couponId: string) {
-  let subPath = `/coupon/${shop}/`
+  let subPath = `/coupon/${shop}`
   return `${config.file.show_url}${subPath}/${couponId}.png`
 }