diff --git a/package.json b/package.json
index 67e7b3d..c484b44 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "bluebird": "^3.1.1",
-    "istanbul": "^0.4.2",
+    "istanbul": "^0.4.3",
     "mocha": "^2.3.3"
   },
   "scripts": {