diff --git a/package.json b/package.json
index b5dc077..7394ef9 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,8 @@
 		"test": "tests"
 	},
 	"devDependencies": {
-		"coveralls": "^2.11.1"
+		"coveralls": "^2.11.1",
+		"istanbul": "^0.3.0"
 	},
 	"scripts": {
 		"test": "node tests/tests.js",