diff --git a/package.json b/package.json
index bd9473d8..5b19deac 100644
--- a/package.json
+++ b/package.json
@@ -111,7 +111,7 @@
     "watch:node": "rollup -c rollup.config.js -w",
     "watch:test": "jest --watch",
     "clean": "rm ./dist",
-    "prepare": "npm run clean ; npm run build"
+    "prepare": "npm run clean && npm run build"
   },
   "types": "dist/",
   "unpkg": "dist/browser.js",