diff --git a/package.json b/package.json
index 9f4fa05..4ad04d0 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
 	, "scripts": {
 		"pegjs": "node_modules/.bin/pegjs src/main/pegjs/SdpParser.pegjs src/main/js/SdpParser.js"
 		, "test": "node_modules/.bin/jasmine"
-		, "prepublish": "npm run pegjs & npm run test"
+		, "postinstall": "npm run pegjs"
+		, "prepublish": "npm run pegjs & npm test"
 	}
 }