diff --git a/zoobot/pytorch/training/webdatamodule.py b/zoobot/pytorch/training/webdatamodule.py
index a359c635..6449af55 100644
--- a/zoobot/pytorch/training/webdatamodule.py
+++ b/zoobot/pytorch/training/webdatamodule.py
@@ -100,7 +100,8 @@ def make_loader(self, urls, mode="train"):
             batch_size=None,  # already batched
             shuffle=False,  # already shuffled
             num_workers=self.num_workers,
-            pin_memory=True
+            pin_memory=True,
+            prefetch_factor=10
         )
 
         # print('sampling')