diff --git a/package.json b/package.json
index 5de0561..919246f 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "grunt-contrib-watch": "^0.6.1",
     "grunt-contrib-jshint": "^0.10.0",
     "jshint-stylish": "^0.1.5",
-    "istanbul": "^0.2.7",
+    "istanbul": "^0.4.4",
     "mocha": "^1.18.2",
     "sinon": "^1.9.1",
     "proxyquire": "^0.6.0"