diff --git a/lerobot/common/datasets/push_dataset_to_hub/aloha_dora_format.py b/lerobot/common/datasets/push_dataset_to_hub/aloha_dora_format.py
index 18c4c7f4..d1e5a52c 100644
--- a/lerobot/common/datasets/push_dataset_to_hub/aloha_dora_format.py
+++ b/lerobot/common/datasets/push_dataset_to_hub/aloha_dora_format.py
@@ -114,7 +114,7 @@ def load_from_raw(raw_dir: Path, out_dir: Path, fps: int):
     # sanity check
     has_nan = df.isna().any().any()
     if has_nan:
-        raise ValueError("Dataset contains Nan values.") 
+        raise ValueError("Dataset contains Nan values.")
 
     # sanity check episode indices go from 0 to n-1
     ep_ids = [ep_idx for ep_idx, _ in df.groupby("episode_index")]