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 ## Updates !!!
 
-**(2020-May-16)** The official paper of our **U^2-Net (U square net)** ([**PDF in elsevier**](https://www.sciencedirect.com/science/article/pii/S0031320320302077?dgcid=author), [**PDF in arxiv**](https://webdocs.cs.ualberta.ca/~xuebin/U2Net_PR_2020.pdf)) is now available. If you are not able to access that, please feel free to drop me an email.
+**(2020-May-18)** The official paper of our **U^2-Net (U square net)** ([**PDF in elsevier**](https://www.sciencedirect.com/science/article/pii/S0031320320302077?dgcid=author), [**PDF in arxiv**](https://webdocs.cs.ualberta.ca/~xuebin/U2Net_PR_2020.pdf)) is now available. If you are not able to access that, please feel free to drop me an email.
 
 **(2020-May-16)** We fixed the upsampling issue of the network. Now, the model should be able to handle **arbitrary input size**. (Tips: This modification is to facilitate the retraining of U^2-Net on your own datasets. When using our pre-trained model on SOD datasets, please keep the input size as 320x32 to guarantee the performance.)