diff --git a/n2vc/libjuju.py b/n2vc/libjuju.py
index b766db1..dd37ec8 100644
--- a/n2vc/libjuju.py
+++ b/n2vc/libjuju.py
@@ -286,7 +286,7 @@
         db_dict: dict = None,
         progress_timeout: float = None,
         total_timeout: float = None,
-        series: str = "xenial",
+        series: str = "bionic",
         wait: bool = True,
     ) -> (Machine, bool):
         """