diff --git a/setup.py b/setup.py
index a1f99a8..255b829 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,7 @@
     license = f.read()
 
 setup(name='python-slimta',
-      version='5.0.0',
+      version='5.0.1',
       author='Ian Good',
       author_email='ian@icgood.net',
       description='Lightweight, asynchronous SMTP libraries.',
diff --git a/slimta/smtp/server.py b/slimta/smtp/server.py
index bee9156..a819fe8 100644
--- a/slimta/smtp/server.py
+++ b/slimta/smtp/server.py
@@ -117,7 +117,7 @@ def __init__(self, socket, handlers, address=None, auth=False,
             self.extensions.add('STARTTLS')
         if auth:
             if isinstance(auth, list):
-                auth_obj = SASLAuth(auth)
+                auth_obj = SASLAuth.named(auth)
             else:
                 auth_obj = SASLAuth.defaults()
             auth_session = AuthSession(auth_obj, self.io)