diff --git a/package.json b/package.json
index 9e1b4f9..a4a4ab9 100644
--- a/package.json
+++ b/package.json
@@ -60,6 +60,7 @@
   },
   "scripts": {
     "test": "npm run lint && NODE_ENV=test node_modules/.bin/nyc node_modules/.bin/mocha",
+    "prepare": "npm test && npm run build",
     "lint": "node_modules/.bin/tslint -c tslint.json -p tsconfig.json",
     "docs": "./node_modules/.bin/typedoc --mode file --excludePrivate --hideGenerator --excludeExternals --target ES5 --out docs/ --name 'Postcode.js' --theme minimal lib/",
     "build": "./node_modules/.bin/tsc",