diff --git a/lectures/_config.yml b/lectures/_config.yml
index 0fa6ae2a..700c3c35 100644
--- a/lectures/_config.yml
+++ b/lectures/_config.yml
@@ -32,20 +32,7 @@ sphinx:
         binderhub_url: https://mybinder.org
       google_analytics_id: UA-54984338-5
       persistent_sidebar: true
-    mathjax_config:
-      TeX:
-        extensions: ["autobold.js"]
-        Macros:
-          "argmax" : "arg\\,max"
-          "argmin" : "arg\\,min"
-          "col"    : "col"
-        tex2jax: 
-          inlineMath: [ ['$','$'], ['\\(','\\)'] ]
-          processEscapes: true
-        SVG:
-          scale: 0.92,
-          useGlobalCache: true
-    mathjax_path: https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.7/MathJax.js?config=TeX-MML-AM_CHTML
+    mathjax_path: https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-svg.js
     tojupyter_static_file_path: ["_static"]
     tojupyter_target_html: true
     tojupyter_urlpath: "https://datascience.quantecon.org/"