diff --git a/package.json b/package.json
index e6e5027..0f9b4b5 100644
--- a/package.json
+++ b/package.json
@@ -55,6 +55,7 @@
 	"scripts": {
 		"build": "rollup -c rollup.config.ts",
 		"lint": "eslint *.ts \"+(smtp|test)/*.ts\"",
+		"tsc": "tsc",
 		"test": "ava --serial",
 		"test-cjs": "npm run build && npm run test -- --node-arguments='--title=cjs'"
 	},