diff --git a/src/utils/bonus.js b/src/utils/bonus.js
index 8419a1ec..c85461d5 100644
--- a/src/utils/bonus.js
+++ b/src/utils/bonus.js
@@ -301,5 +301,5 @@ export function formatTime(date) {
   const hours = String(date.getHours()).padStart(2, '0')
   const minutes = String(date.getMinutes()).padStart(2, '0')
   const seconds = String(date.getSeconds()).padStart(2, '0')
-  return `${year}${month}${day}_${hours}${minutes}${seconds}`
+  return `${year}-${month}-${day}_${hours}-${minutes}-${seconds}`
 }