diff --git a/mastochess.py b/mastochess.py
index 91710d4..bc7dd35 100644
--- a/mastochess.py
+++ b/mastochess.py
@@ -4,6 +4,7 @@ import os.path
 import re
 import unidecode
 from datetime import datetime, timedelta
+import time
 from mastodon import Mastodon
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
@@ -241,11 +242,19 @@ def get_piece_name(captured_piece):
     return piece_name
 
 def get_mentions():
-
+    
     account_id_lst = []
 
     status_id_lst = []
 
+    if time.localtime().tm_isdst == 0:
+
+        interval_time = '60 minutes'
+
+    elif time.localtime().tm_isdst == 1:
+
+        interval_time = '120 minutes'
+
     conn = None
 
     try:
@@ -254,7 +263,7 @@ def get_mentions():
 
         cur = conn.cursor()
 
-        select_query = "select account_id, id from statuses where created_at + interval '60 minutes' > now() - interval '5 minutes'"
+        select_query = "select account_id, id from statuses where created_at + interval '" + interval_time + "' > now() - interval '5 minutes'"
         select_query += " and id=any (select status_id from mentions where account_id=(%s)) order by created_at asc"
 
         cur.execute(select_query, (str(bot_id),))