diff --git a/packages/transformers/typescript-types/package.json b/packages/transformers/typescript-types/package.json
index c1e4382f8e0..53bca211c57 100644
--- a/packages/transformers/typescript-types/package.json
+++ b/packages/transformers/typescript-types/package.json
@@ -20,6 +20,7 @@
     "parcel": "^2.0.0"
   },
   "dependencies": {
+    "@parcel/diagnostic": "^2.0.0",
     "@parcel/plugin": "^2.0.0",
     "@parcel/source-map": "^2.0.0",
     "@parcel/ts-utils": "^2.0.0",