diff --git a/sp_api/api/amazon_warehousing_and_distribu/amazon_warehousing_and_distribu.py b/sp_api/api/amazon_warehousing_and_distribu/amazon_warehousing_and_distribu.py
index 72b5392ea..bb5df7b9e 100644
--- a/sp_api/api/amazon_warehousing_and_distribu/amazon_warehousing_and_distribu.py
+++ b/sp_api/api/amazon_warehousing_and_distribu/amazon_warehousing_and_distribu.py
@@ -4,7 +4,7 @@
 from sp_api.base import Client, sp_endpoint, fill_query_params, ApiResponse
 
 
-class AmazonWarehousingAndDistributionVersion(enum.Enum):
+class AmazonWarehousingAndDistributionVersion(str, enum.Enum):
     V_2024_05_09 = "2024-05-09"
     LATEST = "2024-05-09"