diff --git a/packages/casting/package.json b/packages/casting/package.json
index 1b5fee77acba..361961a6a18a 100644
--- a/packages/casting/package.json
+++ b/packages/casting/package.json
@@ -43,6 +43,7 @@
     "ava": "^5.3.0",
     "c8": "^9.1.0",
     "express": "^4.17.1",
+    "tsd": "^0.30.7",
     "ws": "^7.2.0"
   },
   "publishConfig": {