diff --git a/_vendors.yml b/_vendors.yml
index ff1b5e5..b5a401d 100644
--- a/_vendors.yml
+++ b/_vendors.yml
@@ -27,7 +27,7 @@ prism_line_numbers:
   alias: prism
 mathjax:
   name: mathjax
-  version: 3.0.5
+  version: 3.1.0
   file: es5/tex-mml-chtml.js
 katex:
   name: katex
diff --git a/layout/_third-party/math/mathjax.njk b/layout/_third-party/math/mathjax.njk
index eca67de..20e1fa4 100644
--- a/layout/_third-party/math/mathjax.njk
+++ b/layout/_third-party/math/mathjax.njk
@@ -1,12 +1,6 @@
 <script>
   if (typeof MathJax === 'undefined') {
     window.MathJax = {
-      loader: {
-        source: {
-          '[tex]/amsCd': '[tex]/amscd',
-          '[tex]/AMScd': '[tex]/amscd'
-        }
-      },
       tex: {
         inlineMath: {'[+]': [['$', '$']]},
         tags: 'ams'