diff --git a/package.json b/package.json
index 3580c61..94d1bd1 100644
--- a/package.json
+++ b/package.json
@@ -47,6 +47,7 @@
     },
     "scripts": {
         "test": "npm run node-test && grunt && npm run browser-test",
+        "prepublishOnly": "npm run build",
         "build": "node_modules/.bin/grunt",
         "node-test": "node tests/node-all-tests.js",
         "browser-test": "testem ci --file tests/testem.json",