diff --git a/src/aiovantage/objects/station_object.py b/src/aiovantage/objects/station_object.py
index 0f45697..f1a5ba5 100644
--- a/src/aiovantage/objects/station_object.py
+++ b/src/aiovantage/objects/station_object.py
@@ -9,5 +9,5 @@
 class StationObject(LocationObject):
     """Base class for all station objects."""
 
-    serial_number: str
+    serial_number: int
     bus: int