diff --git a/seahub/profile/settings.py b/seahub/profile/settings.py
index 59be730b4d..1e41ac4cb1 100644
--- a/seahub/profile/settings.py
+++ b/seahub/profile/settings.py
@@ -1,7 +1,7 @@
 from django.conf import settings
 
-NICKNAME_CACHE_TIMEOUT = getattr(settings, 'NICKNAME_CACHE_TIMEOUT', 24 * 60 * 60)
+NICKNAME_CACHE_TIMEOUT = getattr(settings, 'NICKNAME_CACHE_TIMEOUT', 14 * 24 * 60 * 60)
 NICKNAME_CACHE_PREFIX = getattr(settings, 'NICKNAME_CACHE_PREFIX', 'NICKNAME_')
 
-EMAIL_ID_CACHE_TIMEOUT = getattr(settings, 'EMAIL_ID_CACHE_TIMEOUT', 24 * 60 * 60)
+EMAIL_ID_CACHE_TIMEOUT = getattr(settings, 'EMAIL_ID_CACHE_TIMEOUT', 14 * 24 * 60 * 60)
 EMAIL_ID_CACHE_PREFIX = getattr(settings, 'EMAIL_ID_CACHE_PREFIX', 'EMAIL_ID_')
diff --git a/seahub/settings.py b/seahub/settings.py
index c00907b6fd..5e59a561c0 100644
--- a/seahub/settings.py
+++ b/seahub/settings.py
@@ -193,7 +193,7 @@ AVATAR_GRAVATAR_BACKUP = False
 AVATAR_DEFAULT_URL = '/avatars/default.jpg'
 AVATAR_DEFAULT_NON_REGISTERED_URL = '/avatars/default-non-register.jpg'
 AVATAR_MAX_AVATARS_PER_USER = 1
-AVATAR_CACHE_TIMEOUT = 24 * 60 * 60
+AVATAR_CACHE_TIMEOUT = 14 * 24 * 60 * 60
 AVATAR_ALLOWED_FILE_EXTS = ('.jpg', '.png', '.jpeg', '.gif')
 AUTO_GENERATE_AVATAR_SIZES = (16, 20, 28, 36, 40, 48, 60, 80)
 # Group avatar