diff --git a/backend/open_webui/routers/configs.py b/backend/open_webui/routers/configs.py
index dd0cbf4f73..3e37f05eef 100644
--- a/backend/open_webui/routers/configs.py
+++ b/backend/open_webui/routers/configs.py
@@ -731,7 +731,7 @@ async def set_code_execution_config(
 class ModelsConfigForm(BaseModel):
     DEFAULT_MODELS: str | None
     DEFAULT_PINNED_MODELS: str | None
-    MODEL_ORDER_LIST: list[str | None]
+    MODEL_ORDER_LIST: list[str] | None
     DEFAULT_MODEL_METADATA: dict | None = None
     DEFAULT_MODEL_PARAMS: dict | None = None
 
diff --git a/backend/open_webui/routers/retrieval.py b/backend/open_webui/routers/retrieval.py
index e0afd63fd0..6833d491db 100644
--- a/backend/open_webui/routers/retrieval.py
+++ b/backend/open_webui/routers/retrieval.py
@@ -790,7 +790,7 @@ class WebConfig(BaseModel):
     WEB_SEARCH_TRUST_ENV: bool | None = None
     WEB_SEARCH_RESULT_COUNT: int | None = None
     WEB_SEARCH_CONCURRENT_REQUESTS: int | None = None
-    WEB_SEARCH_DOMAIN_FILTER_LIST: list[str | None] = []
+    WEB_SEARCH_DOMAIN_FILTER_LIST: list[str] | None = []
     WEB_FETCH_MAX_CONTENT_LENGTH: int | None = None
     WEB_LOADER_CONCURRENT_REQUESTS: int | None = None
     BYPASS_WEB_SEARCH_EMBEDDING_AND_RETRIEVAL: bool | None = None