diff --git a/README.md b/README.md
index 38da9a4..b559747 100644
--- a/README.md
+++ b/README.md
@@ -91,6 +91,14 @@ hidden = true
 +++
 ```
 
+### Enable KaTeX for this post
+Enable KaTeX for a specific post without enabling the global switch.
+```
++++
+katex = true
++++
+```
+
 ## Contributing
 
 1. Fork it!
diff --git a/layouts/partials/footer.html b/layouts/partials/footer.html
index ac3795a..475b6f6 100644
--- a/layouts/partials/footer.html
+++ b/layouts/partials/footer.html
@@ -12,7 +12,7 @@
     <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.9.0/highlight.min.js" integrity="sha256-KbfTjB0WZ8vvXngdpJGY3Yp3xKk+tttbqClO11anCIU=" crossorigin="anonymous"></script>
     <script>hljs.initHighlightingOnLoad();</script>
 
-    {{ if .Site.Params.Katex }}
+    {{ if $.Param "katex" }}
         <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/katex.min.css" integrity="sha384-wITovz90syo1dJWVh32uuETPVEtGigN07tkttEqPv+uR2SE/mbQcG7ATL28aI9H0" crossorigin="anonymous">
         <script src="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/katex.min.js" integrity="sha384-/y1Nn9+QQAipbNQWU65krzJralCnuOasHncUFXGkdwntGeSvQicrYkiUBwsgUqc1" crossorigin="anonymous"></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/contrib/auto-render.min.js" integrity="sha256-ExtbCSBuYA7kq1Pz362ibde9nnsHYPt6JxuxYeZbU+c=" crossorigin="anonymous"></script>