diff --git a/main.py b/main.py
index 39acb36..3ae286b 100644
--- a/main.py
+++ b/main.py
@@ -161,7 +161,7 @@ def get_nico_deerjika ():
            '/contents/search')
 
     now = datetime.now ()
-    base = now - timedelta (hours = 4)
+    base = now - timedelta (hours = 12)
 
     params = { 'q':          '伊地知ニジカ',
                'targets':    'tags',