diff --git a/packages/better-dni/package.json b/packages/better-dni/package.json
index ec4fcb4..9cce4c3 100644
--- a/packages/better-dni/package.json
+++ b/packages/better-dni/package.json
@@ -13,7 +13,7 @@
     "benchmark": "node benchmark.js",
     "build": "rollup -c && yarn run dts",
     "dev": "tsc -w",
-    "dts": "tsc --emitDeclarationOnly -d --declarationDir ./dist/types src/index.ts",
+    "dts": "tsc --lib es2015 --emitDeclarationOnly -d --declarationDir ./dist/types src/index.ts",
     "minify": "uglifyjs ./dist/index.js --compress -o ./dist/index.min.js",
     "playground": "yarn build && node playground.js",
     "test": "nyc mocha && nyc report --reporter=lcov"