diff --git a/docs/guide.html b/docs/guide.html
index 43a5d7b0..bd8fa5d8 100644
--- a/docs/guide.html
+++ b/docs/guide.html
@@ -901,8 +901,8 @@
// define date -> str convertion
format: date => {
- const day = date.getDate();
- const month = date.getMonth() + 1;
+ let day = date.getDate();
+ let month = date.getMonth() + 1;
const year = date.getFullYear();
if (day < 10) day = "0" + day;