diff --git a/sources/unstructured_data/google_drive/__init__.py b/sources/unstructured_data/google_drive/__init__.py
index 1eecaa3a3..5429ef1b5 100644
--- a/sources/unstructured_data/google_drive/__init__.py
+++ b/sources/unstructured_data/google_drive/__init__.py
@@ -7,7 +7,7 @@
 from dlt.common import logger
 from dlt.extract.source import TDataItem, TDataItems
 from dlt.sources.credentials import GcpOAuthCredentials, GcpServiceAccountCredentials
-from googleapiclient.discovery import build
+from googleapiclient.discovery import build  # type: ignore
 
 from .helpers import download_file_from_google_drive
 from .settings import FOLDER_IDS, STORAGE_FOLDER_PATH
diff --git a/sources/unstructured_data/google_drive/helpers.py b/sources/unstructured_data/google_drive/helpers.py
index 4503cf843..cb103c9cb 100644
--- a/sources/unstructured_data/google_drive/helpers.py
+++ b/sources/unstructured_data/google_drive/helpers.py
@@ -1,8 +1,8 @@
 import io
 from typing import Any
 
-from googleapiclient.errors import HttpError
-from googleapiclient.http import MediaIoBaseDownload
+from googleapiclient.errors import HttpError   # type: ignore
+from googleapiclient.http import MediaIoBaseDownload   # type: ignore
 
 
 def download_file_from_google_drive(service: Any, file_id: str, file_path: str) -> None:
diff --git a/sources/unstructured_data/inbox/__init__.py b/sources/unstructured_data/inbox/__init__.py
index 29a53de6f..74e0246bc 100644
--- a/sources/unstructured_data/inbox/__init__.py
+++ b/sources/unstructured_data/inbox/__init__.py
@@ -103,6 +103,7 @@ def get_message_uids(criterias: Sequence[str]) -> Optional[TDataItems]:
 
             if not message_uids:
                 logger.warning("No emails found.")
+                return None
             else:
                 return [
                     {"message_uid": int(message_uid)} for message_uid in message_uids
diff --git a/sources/unstructured_data/local_folder/__init__.py b/sources/unstructured_data/local_folder/__init__.py
index 831cb7506..28ba6354e 100644
--- a/sources/unstructured_data/local_folder/__init__.py
+++ b/sources/unstructured_data/local_folder/__init__.py
@@ -12,8 +12,8 @@
 }
 
 
-@dlt.resource(write_disposition="replace")
-def local_folder_source(
+@dlt.resource(write_disposition="replace", name="local_folder")
+def local_folder_resource(
     data_dir: Union[str, Sequence[str]],
 ) -> TDataItem:
     """
diff --git a/sources/unstructured_data_pipeline.py b/sources/unstructured_data_pipeline.py
index 4786c2f78..2d5ba5fcf 100644
--- a/sources/unstructured_data_pipeline.py
+++ b/sources/unstructured_data_pipeline.py
@@ -3,7 +3,7 @@
 
 
 def from_local_folder_to_structured(data_dir: str) -> None:
-    from unstructured_data.local_folder import local_folder_source
+    from unstructured_data.local_folder import local_folder_resource
 
     # configure the pipeline with your destination details
     pipeline = dlt.pipeline(
@@ -13,7 +13,7 @@ def from_local_folder_to_structured(data_dir: str) -> None:
         full_refresh=True,
     )
 
-    data_resource = local_folder_source(data_dir)
+    data_resource = local_folder_resource(data_dir)
     filtered_data_resource = data_resource.add_filter(
         lambda item: item["content_type"] == "application/pdf"
     )