diff --git a/src/litdata/streaming/item_loader.py b/src/litdata/streaming/item_loader.py
index 4adc4d6f..7c8b5a64 100644
--- a/src/litdata/streaming/item_loader.py
+++ b/src/litdata/streaming/item_loader.py
@@ -313,7 +313,7 @@ def _load_chunk(self, chunk_index: int, chunk_filepath: str) -> None:
         offset = (1 + chunk["chunk_size"] + 1) * 4
         mmap = np.memmap(chunk_filepath, mode="r", order="C", offset=offset)
         self._mmaps[chunk_index] = mmap
-        self._buffers[chunk_index] = memoryview(mmap)  
+        self._buffers[chunk_index] = memoryview(mmap)
 
     def pre_load_chunk(self, chunk_index: int, chunk_filepath: str) -> None:
         # This is called within the prepare chunks thread, so we overlap data loading with data reading.