diff --git a/index.js b/index.js
index a155dc2..3577e30 100644
--- a/index.js
+++ b/index.js
@@ -12,13 +12,17 @@ function snapshotPath(){
 
     return "/snapshot/snapshot-"
         + date.getFullYear()
-        + date.getMonth()
-        + date.getDay()
-        + "-"
-        + date.getHours()
-        + date.getMinutes()
-        + date.getSeconds()
-        + "-"
+		+ "-"
+        + String(date.getMonth() + 1).padStart(2, '0')
+		+ "-"
+        + String(date.getDate()).padStart(2, '0')
+        + "_"
+        + String(date.getHours()).padStart(2, '0')
+		+ "-"
+        + String(date.getMinutes()).padStart(2, '0')
+		+ "-"
+		+ String(date.getSeconds()).padStart(2, '0')
+        + "_"
         + date.getMilliseconds()
         +".jpg";
 }