diff --git a/package.json b/package.json
index 1462c17b..e6850c7a 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "type-is": "~1.6.10"
   },
   "devDependencies": {
-    "istanbul": "0.4.1",
+    "istanbul": "0.4.2",
     "methods": "~1.1.1",
     "mocha": "2.3.4",
     "supertest": "1.1.0"