diff --git a/IPython/html/auth/login.py b/IPython/html/auth/login.py
index a412082..fa3b6ba 100644
--- a/IPython/html/auth/login.py
+++ b/IPython/html/auth/login.py
@@ -74,10 +74,10 @@ class LoginHandler(IPythonHandler):
if not app.ip:
warning = "WARNING: The notebook server is listening on all IP addresses"
if ssl_options is None:
- app.log.critical(warning + " and not using encryption. This "
+ app.log.warning(warning + " and not using encryption. This "
"is not recommended.")
if not app.password:
- app.log.critical(warning + " and not using authentication. "
+ app.log.warning(warning + " and not using authentication. "
"This is highly insecure and not recommended.")
@classmethod