diff --git a/nomic/dataset.py b/nomic/dataset.py
index 4906f33..fa412f3 100644
--- a/nomic/dataset.py
+++ b/nomic/dataset.py
@@ -1409,9 +1409,10 @@ def _add_blobs(
         # TODO: add support for other modalities
         images = []
         for uuid, blob in tqdm(zip(ids, blobs), total=len(ids), desc="Loading images"):
-            if isinstance(blob, str) and os.path.exists(blob):
+            if (isinstance(blob, str) or isinstance(blob, Path)) and os.path.exists(blob):
                 # Auto resize to max 512x512
                 image = Image.open(blob)
+                image = image.convert("RGB")
                 if image.height > 512 or image.width > 512:
                     image = image.resize((512, 512))
                 buffered = BytesIO()
@@ -1420,6 +1421,7 @@ def _add_blobs(
             elif isinstance(blob, bytes):
                 images.append((uuid, blob))
             elif isinstance(blob, Image.Image):
+                blob = blob.convert("RGB")  # type: ignore
                 if blob.height > 512 or blob.width > 512:
                     blob = blob.resize((512, 512))
                 buffered = BytesIO()