diff --git a/api/configs/middleware/vdb/opensearch_config.py b/api/configs/middleware/vdb/opensearch_config.py
index 55817eca3e..96f478e9a6 100644
--- a/api/configs/middleware/vdb/opensearch_config.py
+++ b/api/configs/middleware/vdb/opensearch_config.py
@@ -54,6 +54,5 @@ class OpenSearchConfig(BaseSettings):
     )
 
     OPENSEARCH_AWS_SERVICE: Optional[Literal["es", "aoss"]] = Field(
-        description="AWS service for OpenSearch (e.g. 'aoss' for OpenSearch Serverless)",
-        default=None
+        description="AWS service for OpenSearch (e.g. 'aoss' for OpenSearch Serverless)", default=None
     )