diff --git a/python/nav/django/settings.py b/python/nav/django/settings.py
index d9aacb4ef5..a4a6e2a2f3 100644
--- a/python/nav/django/settings.py
+++ b/python/nav/django/settings.py
@@ -135,7 +135,7 @@
     'django.contrib.messages.middleware.MessageMiddleware',
 )
 
-SESSION_SERIALIZER = 'django.contrib.sessions.serializers.PickleSerializer'
+SESSION_SERIALIZER = 'django.contrib.sessions.serializers.JSONSerializer'
 SESSION_ENGINE = 'django.contrib.sessions.backends.db'
 SESSION_COOKIE_AGE = int(_webfront_config.get('sessions', {}).get('timeout', 3600))
 SESSION_COOKIE_NAME = 'nav_sessionid'