diff --git a/troveclient/v1/instances.py b/troveclient/v1/instances.py
index ab7f71a2..2440fe3c 100644
--- a/troveclient/v1/instances.py
+++ b/troveclient/v1/instances.py
@@ -70,11 +70,14 @@ class Instances(base.ManagerWithFind):
             user = self.api.client.auth._username
             key = self.api.client.auth._password
             tenant_name = self.api.client.auth._project_name
+            auth_version = "3.0"
         else:
             auth_url = self.api.client.auth_url
             user = self.api.client.username
             key = self.api.client.password
             tenant_name = self.api.client.tenant
+            auth_version = "2.0"
+
         # remove '/tokens' from the end of auth_url so it works for swift
         token_str = "/tokens"
         if auth_url.endswith(token_str):
@@ -83,7 +86,8 @@ class Instances(base.ManagerWithFind):
         os_options = {'tenant_name': tenant_name, 'region_name': region_name}
 
         return swift_client.Connection(
-            auth_url, user, key, auth_version="2.0", os_options=os_options)
+            auth_url, user, key, auth_version=auth_version,
+            os_options=os_options)
 
     def create(self, name, flavor_id, volume=None, databases=None, users=None,
                restorePoint=None, availability_zone=None, datastore=None,