diff --git a/package.json b/package.json
index 51d0c72..b132b9b 100644
--- a/package.json
+++ b/package.json
@@ -7,11 +7,15 @@
 		"promise-nodify": "*"
 	},
 	"devDependencies": {
-		"browserify": "*",
-		"uglify-js": "*"
+		"es3ify": "*"
 	},
 	"scripts": {
 		"build-js": "mkdir -p ../../dist && browserify index.js -s Validation -o ../../dist/pouchdb-validation.js",
 		"build": "npm run build-js; cd ../../dist; uglifyjs pouchdb-validation.js -mc > pouchdb-validation.min.js"
+	},
+	"browserify": {
+		"transform": [
+			"es3ify"
+		]
 	}
 }