diff --git a/crates/mdbook-html/front-end/templates/index.hbs b/crates/mdbook-html/front-end/templates/index.hbs
index b1834189f9..c2e77e5eba 100644
--- a/crates/mdbook-html/front-end/templates/index.hbs
+++ b/crates/mdbook-html/front-end/templates/index.hbs
@@ -47,7 +47,7 @@
 
         {{#if mathjax_support}}
         <!-- MathJax -->
-        <script async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
+        <script async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
         {{/if}}
 
         <!-- Provide site root and default themes to javascript -->