diff --git a/cognee/base_config.py b/cognee/base_config.py
index ef03b1f70..2dcd859e7 100644
--- a/cognee/base_config.py
+++ b/cognee/base_config.py
@@ -1,3 +1,4 @@
+from typing import Optional
 from functools import lru_cache
 from pydantic_settings import BaseSettings, SettingsConfigDict
 from cognee.root_dir import get_absolute_path
@@ -6,8 +7,8 @@ from cognee.shared.data_models import MonitoringTool
 class BaseConfig(BaseSettings):
     data_root_directory: str = get_absolute_path(".data")
     monitoring_tool: object = MonitoringTool.LANGFUSE
-    graphistry_username: str = None
-    graphistry_password: str = None
+    graphistry_username: Optional[str] = None
+    graphistry_password: Optional[str] = None
 
     model_config = SettingsConfigDict(env_file = ".env", extra = "allow")