1--- a/nbdime/webapp/nbdimeserver.py
2+++ b/nbdime/webapp/nbdimeserver.py
3@@ -388,6 +388,7 @@
4 'jinja2_env': env,
5 'local_hostnames': ['localhost', '127.0.0.1'],
6 'cookie_secret': base64.encodebytes(os.urandom(32)), # Needed even for an unsecured server.
7+ 'allow_unauthenticated_access': True,
8 }
9
10 try: