diff --git a/dnscms/dnscms/settings/dev.py b/dnscms/dnscms/settings/dev.py
index fdad901..091f0ad 100644
--- a/dnscms/dnscms/settings/dev.py
+++ b/dnscms/dnscms/settings/dev.py
@@ -11,6 +11,11 @@ ALLOWED_HOSTS = ["*"]
 
 EMAIL_BACKEND = "django.core.mail.backends.console.EmailBackend"
 
+# dnscms and galtinn both run on localhost in dev, and cookies ignore ports:
+# unshared cookie names keep the two apps from deleting each other's sessions
+SESSION_COOKIE_NAME = "dnscms_sessionid"
+CSRF_COOKIE_NAME = "dnscms_csrftoken"
+
 try:
     from .local import *  # noqa: F403
 except ImportError: