diff --git a/package.json b/package.json
index d37d5af..0c44232 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
   ],
   "dependencies": {
     "@types/mdast": "^3.0.0",
+    "@types/unist": "^2.0.0",
     "mdast-util-to-markdown": "^1.0.0",
     "parse-entities": "^3.0.0",
     "stringify-entities": "^4.0.0",