diff --git a/package.json b/package.json
index 79c9f0d5..766f44bf 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "chai": "3.4.1",
     "codecov.io": "0.1.6",
     "ghooks": "1.0.0",
-    "istanbul": "0.3.22",
+    "istanbul": "0.4.2",
     "mocha": "2.3.4",
     "semantic-release": "^4.3.5"
   },