diff --git a/_config.yml b/_config.yml
index 7776179..b3c1e80 100644
--- a/_config.yml
+++ b/_config.yml
@@ -265,7 +265,7 @@ links:
       demo20: ""
       demo21: "• [Demo](https://data8.datahub.berkeley.edu/hub/user-redirect/git-pull?repo=https://github.com/data-8/materials-fa24&urlpath=tree/materials-fa24/lec/lec21/mr2.ipynb&branch=main)"
       demo22: "• [Demo](https://data8.datahub.berkeley.edu/hub/user-redirect/git-pull?repo=https://github.com/data-8/materials-fa24&urlpath=tree/materials-fa24/lec/lec22/lec22.ipynb&branch=main)"
-      demo23: ""
+      demo23: "• [Demo](https://data8.datahub.berkeley.edu/hub/user-redirect/git-pull?repo=https://github.com/data-8/materials-fa24&urlpath=tree/materials-fa24/lec/lec23/lec23.ipynb&branch=main)"
       demo24: ""
       demo25: ""
       demo26: ""
@@ -306,7 +306,7 @@ links:
       slide20: "[Slides](https://docs.google.com/presentation/d/1G6S6_TclwM9g50JLAMXrT5jPqdbfNM9p6FUcTDPuppg/edit?usp=sharing)"
       slide21: "[Slides](https://docs.google.com/presentation/d/1eGORJlAnmPrI_EW_fg0BUkzcHQAjO8kZI3TE9CTUn-I/edit?usp=sharing)"
       slide22: "[Slides](https://docs.google.com/presentation/d/1lk7mauyJcNmO3fYbooMvoa61aWJ1o1bPB6sMFWQAwLM/edit?usp=sharing)"
-      slide23: ""
+      slide23: "[Slides](https://docs.google.com/presentation/d/1-HdYcHSDkX-N2mBePG04rwJDx6hQYLz_Xf_zBoLzWQA/edit?usp=sharing)"
       slide24: ""
       slide25: ""
       slide26: ""