diff --git a/nova/objects/service.py b/nova/objects/service.py
index 9cdf618ea2fd..c027412d9d17 100644
--- a/nova/objects/service.py
+++ b/nova/objects/service.py
@@ -218,10 +218,11 @@ SERVICE_VERSION_HISTORY = (
 # This is used to raise an error at service startup if older than N-1 computes
 # are detected. Update this at the beginning of every release cycle to point to
 # the smallest service version that was added in N-1.
-OLDEST_SUPPORTED_SERVICE_VERSION = 'Wallaby'
+OLDEST_SUPPORTED_SERVICE_VERSION = 'Xena'
 SERVICE_VERSION_ALIASES = {
     'Victoria': 52,
     'Wallaby': 54,
+    'Xena': 57,
 }