diff --git a/e2e-tests/mdx/package.json b/e2e-tests/mdx/package.json
index 1c087bbbac6fe..54e8b500abd14 100644
--- a/e2e-tests/mdx/package.json
+++ b/e2e-tests/mdx/package.json
@@ -19,7 +19,7 @@
     "react-dom": "^18.2.0",
     "rehype-slug": "^5.1.0",
     "remark-gfm": "^3.0.1",
-    "theme-ui": "^0.15.7"
+    "theme-ui": "^0.16.0"
   },
   "keywords": [
     "gatsby"