diff --git a/package.json b/package.json
index f306ade..67f881c 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "coveralls": "2.11.2",
     "eslint": "2.13.1",
     "eslint-config-onelint": "1.2.0",
-    "istanbul": "0.3.13",
+    "istanbul": "0.4.5",
     "minimist": "1.1.1",
     "mocha": "2.3.3",
     "unexpected": "10.0.0",