diff --git a/lib/constants.js b/lib/constants.js
index 275df0f..4325524 100644
--- a/lib/constants.js
+++ b/lib/constants.js
@@ -968,6 +968,11 @@ export const LANGUAGES = [
     mode: 'sql',
     highlight: true,
   },
+  {
+    name: 'Stan',
+    mode: 'stan',
+    highlight: true,
+  },
   {
     name: 'Stylus',
     mode: 'stylus',