Update README.md

README.md

@@ -42,7 +42,7 @@ utterances.append(generation[0]) # for future loop
 ```
 
 
-Please kindly cite the [original paper](https://aclanthology.org/2021.acl-long.269/) if you use this model:
+Please kindly cite the [original paper](https://arxiv.org/abs/2106.01144) if you use this model:
 
 ```bib
 @inproceedings{liu-etal-2021-towards,