diff --git a/theme/package.json b/theme/package.json
index 17c79704a2a..6a492e489d6 100644
--- a/theme/package.json
+++ b/theme/package.json
@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "@github/combobox-nav": "^2.1.5",
-    "@mdx-js/mdx": "^2.2.1",
+    "@mdx-js/mdx": "^3.1.1",
     "@mdx-js/react": "^1.6.22",
     "@primer/components": "^23.0.0",
     "@primer/octicons-react": "^17.10.0",