diff --git a/package.json b/package.json
index 8590220..cf11d24 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
   "private": false,
   "version": "0.11.0",
   "main": "./src/index.js",
+  "type": "commonjs",
   "sideEffects": false,
   "bin": {
     "monorepo-babel-node": "bin/monorepo-babel-node.js",