diff --git a/src/ims/model/json/_address.py b/src/ims/model/json/_address.py
index f2b838342..018a5f606 100644
--- a/src/ims/model/json/_address.py
+++ b/src/ims/model/json/_address.py
@@ -63,7 +63,7 @@ class AddressJSONType(Enum):
     """
 
     addressType = str
-    description = Optional[str]
+    description: Type[Any] = Optional[str]