diff --git a/dbgpt/storage/vector_store/milvus_store.py b/dbgpt/storage/vector_store/milvus_store.py
index b8b036770..f0984d20e 100644
--- a/dbgpt/storage/vector_store/milvus_store.py
+++ b/dbgpt/storage/vector_store/milvus_store.py
@@ -35,7 +35,7 @@
                 "The uri of milvus store, if not set, will use the default " "uri."
             ),
             optional=True,
-            default="localhost",
+            default=None,
         ),
         Parameter.build_from(
             _("Port"),
@@ -98,8 +98,8 @@ class MilvusVectorConfig(VectorStoreConfig):
 
     model_config = ConfigDict(arbitrary_types_allowed=True)
 
-    uri: str = Field(
-        default="localhost",
+    uri: Optional[str] = Field(
+        default=None,
         description="The uri of milvus store, if not set, will use the default uri.",
     )
     port: str = Field(