diff --git a/package.json b/package.json
index e0364bfa3a..24feedd1e7 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "precodecov": "npm run coverage",
     "lint": "eslint src test/*.js",
     "build": "rollup -c",
-    "prepare": "npm run build",
+    "prepare": "npm run build && npm run tsd",
     "dev": "rollup -cw",
     "pretest": "npm run build",
     "posttest": "agadoo src/internal/index.js",