diff --git a/py/core/base/providers/llm.py b/py/core/base/providers/llm.py
index cb3149002..4e72b69d0 100644
--- a/py/core/base/providers/llm.py
+++ b/py/core/base/providers/llm.py
@@ -23,7 +23,6 @@ class CompletionConfig(ProviderConfig):
     provider: Optional[str] = None
     generation_config: Optional[GenerationConfig] = None
     concurrent_request_limit: int = 256
-    fast_llm: str = "openai/gpt-4o"
     max_retries: int = 3
     initial_backoff: float = 1.0
     max_backoff: float = 64.0
diff --git a/py/core/providers/ingestion/unstructured/base.py b/py/core/providers/ingestion/unstructured/base.py
index 541a05f9b..29c09bf53 100644
--- a/py/core/providers/ingestion/unstructured/base.py
+++ b/py/core/providers/ingestion/unstructured/base.py
@@ -46,30 +46,30 @@ class UnstructuredIngestionConfig(IngestionConfig):
     new_after_n_chars: int = 1500
     overlap: int = 64
 
-    coordinates: bool | None
-    encoding: str | None  # utf-8
-    extract_image_block_types: list[str] | None
-    gz_uncompressed_content_type: str | None
-    hi_res_model_name: str | None
-    include_orig_elements: bool | None
-    include_page_breaks: bool | None
-
-    languages: list[str] | None
-    multipage_sections: bool | None
-    ocr_languages: list[str] | None
+    coordinates: bool | None = None
+    encoding: str | None = None  # utf-8
+    extract_image_block_types: list[str] | None = None
+    gz_uncompressed_content_type: str | None = None
+    hi_res_model_name: str | None = None
+    include_orig_elements: bool | None = None
+    include_page_breaks: bool | None = None
+
+    languages: list[str] | None = None
+    multipage_sections: bool | None = None
+    ocr_languages: list[str] | None = None
     # output_format: Optional[str] = "application/json"
-    overlap_all: bool | None
-    pdf_infer_table_structure: bool | None
-
-    similarity_threshold: float | None
-    skip_infer_table_types: list[str] | None
-    split_pdf_concurrency_level: int | None
-    split_pdf_page: bool | None
-    starting_page_number: int | None
-    strategy: str | None
-    chunking_strategy: str | ChunkingStrategy | None  # type: ignore
-    unique_element_ids: bool | None
-    xml_keep_tags: bool | None
+    overlap_all: bool | None = None
+    pdf_infer_table_structure: bool | None = None
+
+    similarity_threshold: float | None = None
+    skip_infer_table_types: list[str] | None = None
+    split_pdf_concurrency_level: int | None = None
+    split_pdf_page: bool | None = None
+    starting_page_number: int | None = None
+    strategy: str | None = None
+    chunking_strategy: str | ChunkingStrategy | None = None  # type: ignore
+    unique_element_ids: bool | None = None
+    xml_keep_tags: bool | None = None
 
     def to_ingestion_request(self):
         import json