diff --git a/src/main/java/org/ntlab/nemophila/models/accounts/Account.java b/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
index fc90081..8e9a2fd 100644
--- a/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
+++ b/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
@@ -108,7 +108,7 @@
 
     private String confirmDate() {
         Date date = new Date();
-        SimpleDateFormat f = new SimpleDateFormat("yy/MM/dd");
+        SimpleDateFormat f = new SimpleDateFormat("yyyy/MM/dd");
 
         String time = f.format(date);
         return time;