diff --git a/config.py b/config.py
index 1be18f7..506a4d3 100644
--- a/config.py
+++ b/config.py
@@ -4,6 +4,7 @@ import yaml
 from pymongo import MongoClient
 import requests
 from itsdangerous import JSONWebSignatureSerializer
+from datetime import datetime
 
 from utils import strtobool
 from utils.key import Key, KEY_DIR, get_secret_key