diff --git a/src/config/api-server/vnc_auth_keystone.py b/src/config/api-server/vnc_auth_keystone.py
index 33dbd0f9ab2..a3ff51ca7ed 100644
--- a/src/config/api-server/vnc_auth_keystone.py
+++ b/src/config/api-server/vnc_auth_keystone.py
@@ -148,6 +148,11 @@ def __init__(self, server_mgr, args):
             'max_requests': args.max_requests,
             'insecure':args.insecure,
         }
+        try:
+            if 'v3' in args.auth_url:
+                self._conf_info['auth_version'] = 'v3.0'
+        except AttributeError:
+            pass
         if _kscertbundle:
            self._conf_info['cafile'] = _kscertbundle
         self._server_mgr = server_mgr