diff --git a/tapir/settings.py b/tapir/settings.py
index c994200c..98adff26 100644
--- a/tapir/settings.py
+++ b/tapir/settings.py
@@ -436,3 +436,5 @@
 SUBDIV_FOR_HOLIDAYS_AUTO_CANCEL = env.str(
     "SUBDIV_FOR_HOLIDAYS_AUTO_CANCEL", default="BE"
 )
+
+SESSION_COOKIE_AGE = 86400  # one day