diff --git a/openqdc/datasets/potential/alchemy.py b/openqdc/datasets/potential/alchemy.py
index 24c82f2..24c17cd 100644
--- a/openqdc/datasets/potential/alchemy.py
+++ b/openqdc/datasets/potential/alchemy.py
@@ -62,7 +62,7 @@ class Alchemy(BaseDataset):
 
     Reference:
         https://arxiv.org/abs/1906.09427
-        https://alchemy.tencent.com/        
+        https://alchemy.tencent.com/
     """
 
     __name__ = "alchemy"