diff --git a/content/about.md b/content/about.md
index f91c1fd..7be9387 100644
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+++ b/content/about.md
@@ -45,7 +45,7 @@ From a more traditional algorithms perspective, I am also interested in applying
 differential privacy to optimization, machine learning, and mechanism design.
 
 ## Teaching ##
-- **Topics in Security and Privacy Technologies (CS 839)**: [F18](https://pages.cs.wisc.edu/~justhsu/teaching/current/cs839/)
+- **Topics in Security and Privacy Technologies (CS 839)**: [F18](https://pages.cs.wisc.edu/~justhsu/teaching/f18/cs839/)
 - **Introduction to the Theory and Design of PL (CS 538)**: [S19](https://pages.cs.wisc.edu/~justhsu/teaching/current/cs538/)
 
 ## Service ##