diff --git a/libs/milvus/langchain_milvus/retrievers/milvus_hybrid_search.py b/libs/milvus/langchain_milvus/retrievers/milvus_hybrid_search.py
index b05198f..12152cd 100644
--- a/libs/milvus/langchain_milvus/retrievers/milvus_hybrid_search.py
+++ b/libs/milvus/langchain_milvus/retrievers/milvus_hybrid_search.py
@@ -96,9 +96,10 @@ def _validate_fields_name(self) -> None:
             self.text_field in collection_fields
         ), f"{self.text_field} is not a valid field in the collection."
         for field in self.output_fields:  # type: ignore[union-attr]
-            assert (
-                field in collection_fields
-            ), f"{field} is not a valid field in the collection."
+            if not self.collection.schema.enable_dynamic_field:
+                assert (
+                    field in collection_fields
+                ), f"{field} is not a valid field in the collection."
 
     def _get_output_fields(self) -> List[str]:
         if self.output_fields: