diff --git a/content/about.md b/content/about.md
index 53a95b5..acdc645 100644
--- a/content/about.md
+++ b/content/about.md
@@ -51,10 +51,8 @@ differential privacy to optimization, machine learning, and mechanism design.
 - **Reasoning about Probabilistic Programs** <br>
   **Invited Course at [OPLSS 2021](https://www.cs.uoregon.edu/research/summerschool/summer21/index.php)**: 
   [[slides](https://justinhsu.net/files/slides/oplss21.pdf)] [[recordings](https://www.cs.uoregon.edu/research/summerschool/summer21/topics.php)]
-- **Security and Privacy in Data Science (CS 763)**: [F20](teaching/f20/cs763/)
-- **Introduction to the Theory and Design of PL (CS 538)**: [S20](teaching/s20/cs538/)
-- **Security and Privacy in Data Science (CS 763)**: [F19](teaching/f19/cs763/)
-- **Introduction to the Theory and Design of PL (CS 538)**: [S19](teaching/s19/cs538/)
+- **Security and Privacy in Data Science (CS 763)**: [F20](teaching/f20/cs763/) [F19](teaching/f19/cs763/)
+- **Introduction to the Theory and Design of PL (CS 538)**: [S20](teaching/s20/cs538/) [S19](teaching/s19/cs538/)
 - **Topics in Security and Privacy Technologies (CS 839)**: [F18](teaching/f18/cs839/)
 
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