diff --git a/package.json b/package.json
index 515839c2..4742ab73 100644
--- a/package.json
+++ b/package.json
@@ -80,9 +80,11 @@
   ],
   "dependencies": {
     "@types/hast": "^2.0.0",
+    "@types/prop-types": "^15.0.0",
     "@types/unist": "^2.0.0",
     "comma-separated-tokens": "^2.0.0",
     "hast-util-whitespace": "^2.0.0",
+    "mdast-util-to-hast": "^12.0.0",
     "prop-types": "^15.0.0",
     "property-information": "^6.0.0",
     "react-is": "^17.0.0",