diff --git a/package.json b/package.json
index eece07b..356e49c 100644
--- a/package.json
+++ b/package.json
@@ -34,6 +34,7 @@
   ],
   "dependencies": {
     "@types/hast": "^3.0.0",
+    "@types/unist": "^3.0.0",
     "@ungap/structured-clone": "^1.0.0",
     "hast-util-from-parse5": "^8.0.0",
     "hast-util-to-parse5": "^8.0.0",