diff --git a/packages/swingset/package.json b/packages/swingset/package.json
index 46813765e1c..8470cc5a2c8 100644
--- a/packages/swingset/package.json
+++ b/packages/swingset/package.json
@@ -31,7 +31,7 @@
     "@babel/plugin-syntax-jsx": "^7.27.1",
     "@babel/preset-typescript": "^7.28.5",
     "@mdx-js/loader": "^3.1.1",
-    "@mdx-js/react": "^3.1.0",
+    "@mdx-js/react": "^3.1.1",
     "@next/mdx": "^15.0.0",
     "@stylexjs/babel-plugin": "0.19.0",
     "@stylexjs/postcss-plugin": "0.19.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 2f8e12b32ac..78ececae60c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1101,7 +1101,7 @@ importers:
         specifier: ^3.1.1
         version: 3.1.1(webpack@5.102.1(esbuild@0.27.7))
       '@mdx-js/react':
-        specifier: ^3.1.0
+        specifier: ^3.1.1
         version: 3.1.1(@types/react@18.3.28)(react@18.3.1)
       '@next/mdx':
         specifier: ^15.0.0