diff --git a/package.json b/package.json
index fcb60d4..72778cf 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,8 @@
     "clear": "rm -rf dist/ && mkdir dist/",
     "lint:staged": "lint-staged",
     "prepublish": "npm run build",
-    "test": "xo && flow --show-all-errors"
+    "test": "xo && flow --show-all-errors",
+    "format": "prettier --write --single-quote --trailing-comma all --tab-width 4 src/**/*.js"
   },
   "lint-staged": {
     "*.js": [