diff --git a/src/Text/Pandoc/App/CommandLineOptions.hs b/src/Text/Pandoc/App/CommandLineOptions.hs
index e9582eaf2..655ccfbac 100644
--- a/src/Text/Pandoc/App/CommandLineOptions.hs
+++ b/src/Text/Pandoc/App/CommandLineOptions.hs
@@ -699,7 +699,7 @@ options =
                  (OptArg
                   (\arg opt -> do
                       let url' = fromMaybe (defaultMathJaxURL ++
-                                  "MathJax.js?config=TeX-AMS_CHTML-full") arg
+                                  "tex-mml-chtml.js") arg
                       return opt { optHTMLMathMethod = MathJax url'})
                   "URL")
                  "" -- "Use MathJax for HTML math"
diff --git a/src/Text/Pandoc/Writers/Math.hs b/src/Text/Pandoc/Writers/Math.hs
index 61decf2df..a84f74f00 100644
--- a/src/Text/Pandoc/Writers/Math.hs
+++ b/src/Text/Pandoc/Writers/Math.hs
@@ -52,7 +52,7 @@ convertMath writer mt str =
                    InlineMath  -> DisplayInline
 
 defaultMathJaxURL :: String
-defaultMathJaxURL = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/"
+defaultMathJaxURL = "https://cdn.jsdelivr.net/npm/mathjax@3/es5/"
 
 defaultKaTeXURL :: String
 defaultKaTeXURL = "https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.9.0/"