diff --git a/content/about.md b/content/about.md
index eba2af1..9387348 100644
--- a/content/about.md
+++ b/content/about.md
@@ -42,7 +42,7 @@ From a more traditional algorithms perspective, I am also interested in applying
 differential privacy to optimization, machine learning, and mechanism design.
 
 ## Teaching ##
-- **Introduction to the Theory and Design of PL (CS 538)**: [S20](https://pages.cs.wisc.edu/~justhsu/teaching/current/cs538/)
+- **Introduction to the Theory and Design of PL (CS 538)**: [S20](https://pages.cs.wisc.edu/~justhsu/teaching/s20/cs538/)
 - **Security and Privacy in Data Science (CS 763)**: [F19](https://pages.cs.wisc.edu/~justhsu/teaching/current/cs763/)
 - **Introduction to the Theory and Design of PL (CS 538)**: [S19](https://pages.cs.wisc.edu/~justhsu/teaching/s19/cs538/)
 - **Topics in Security and Privacy Technologies (CS 839)**: [F18](https://pages.cs.wisc.edu/~justhsu/teaching/f18/cs839/)