diff --git a/inst/templates/bs4_book.html b/inst/templates/bs4_book.html
index 6bb319fc..ba7afe65 100644
--- a/inst/templates/bs4_book.html
+++ b/inst/templates/bs4_book.html
@@ -158,7 +158,7 @@ <h2>On this page</h2>
     var script = document.createElement("script");
     script.type = "text/javascript";
     var src = "$if(mathjax)$$mathjax$$endif$";
-    if (src === "" || src === "true") src = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/latest.js?config=TeX-AMS-MML_HTMLorMML";
+    if (src === "" || src === "true") src = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/latest.js?config=$if(mathjax-renderer)$$mathjax-renderer$$else$TeX-MML-AM_CHTML$endif$";
     if (location.protocol !== "file:")
       if (/^https?:/.test(src))
         src = src.replace(/^https?:/, '');
diff --git a/inst/templates/gitbook.html b/inst/templates/gitbook.html
index 2f6d3581..59487c5c 100644
--- a/inst/templates/gitbook.html
+++ b/inst/templates/gitbook.html
@@ -205,7 +205,7 @@ <h1>
     var script = document.createElement("script");
     script.type = "text/javascript";
     var src = "$if(mathjax)$$mathjax$$endif$";
-    if (src === "" || src === "true") src = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/latest.js?config=TeX-MML-AM_CHTML";
+    if (src === "" || src === "true") src = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/latest.js?config=$if(mathjax-renderer)$$mathjax-renderer$$else$TeX-MML-AM_CHTML$endif$";
     if (location.protocol !== "file:")
       if (/^https?:/.test(src))
         src = src.replace(/^https?:/, '');