diff --git a/lib/xos-config/xosconfig/synchronizer-config-schema.yaml b/lib/xos-config/xosconfig/synchronizer-config-schema.yaml
index 357e8d9..cba845f 100644
--- a/lib/xos-config/xosconfig/synchronizer-config-schema.yaml
+++ b/lib/xos-config/xosconfig/synchronizer-config-schema.yaml
@@ -15,6 +15,8 @@
 map:
   name:
     type: str
+  core_version:
+    type: str
   desired_state:
     type: str
   xos_dir: