diff --git a/_modules/week-01.md b/_modules/week-01.md
index 20ab060..4ba01c1 100644
--- a/_modules/week-01.md
+++ b/_modules/week-01.md
@@ -30,9 +30,9 @@ Jan 14
 : **Readings**{: .label .label-reading} **(Due 1/21)**
   * **Required**: 
     * [2.1 - TensorFlow](https://arxiv.org/abs/1605.08695)
-    * [2.2 - AudoDiff (Chapter 1 - 3)](https://arxiv.org/pdf/1502.05767)
+    * [2.2 - PyTorch](https://arxiv.org/abs/1912.01703)
   * **Optional**: 
-    * [2.3 - PyTorch](https://arxiv.org/abs/1912.01703)
+    * [2.3 - AudoDiff (Chapter 1 - 3)](https://arxiv.org/pdf/1502.05767)
     * [2.4 - DyNet](https://arxiv.org/pdf/1701.03980)
 
 <!-- : **Readings**{: .label .label-reading} -->