diff --git a/assets/sass/components/_math.scss b/assets/sass/components/_math.scss
index d6e7579..2a66e4d 100644
--- a/assets/sass/components/_math.scss
+++ b/assets/sass/components/_math.scss
@@ -1,4 +1,5 @@
 .MathJax {
     overflow-x: auto;
     overflow-y: hidden;
+    box-sizing: border-box;
 }
diff --git a/layouts/partials/script/single-script.html b/layouts/partials/script/single-script.html
index 2832470..3e39f69 100644
--- a/layouts/partials/script/single-script.html
+++ b/layouts/partials/script/single-script.html
@@ -46,6 +46,7 @@
     }
   };
   </script>
+  <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
   <script async src="{{ $js.mathjax.url }}"></script>
 {{ end }}