diff --git a/local_settings.py.example b/local_settings.py.example
index 6b753b2..5fc9321 100644
--- a/local_settings.py.example
+++ b/local_settings.py.example
@@ -43,6 +43,22 @@ LDAP_BIND_PASSWORD = '...'      # and its password
 LDAP_USER_QUERY = 'supannAliasLogin=%s'  # query to retrieve user, %s is the CAS username
 LDAP_BASE = 'dc=univ,dc=fr'     # base DN for the query
 
+# Session duration
+# From : https://docs.djangoproject.com/en/1.4/topics/http/sessions/
+# You can control whether the session framework uses browser-length sessions
+# vs. persistent sessions with the SESSION_EXPIRE_AT_BROWSER_CLOSE setting.
+# By default, SESSION_EXPIRE_AT_BROWSER_CLOSE is set to False, which means
+# session cookies will be stored in users' browsers for as long as
+# SESSION_COOKIE_AGE. Use this if you don't want people to have to log in every
+# time they open a browser.
+# If SESSION_EXPIRE_AT_BROWSER_CLOSE is set to True, Django will use
+# browser-length cookies -- cookies that expire as soon as the user closes his
+# or her browser. Use this if you want people to have to log in every time they
+# open a browser.
+
+SESSION_EXPIRE_AT_BROWSER_CLOSE = True
+SESSION_COOKIE_AGE = 24*3600  # 1 day, only if SESSION_EXPIRE_AT_BROWSER_CLOSE = False
+
 #
 # Design
 #