diff --git a/node_modules/is-error/package.json b/node_modules/is-error/package.json
index 441791f231..1bf54bcd9d 100644
--- a/node_modules/is-error/package.json
+++ b/node_modules/is-error/package.json
@@ -17,7 +17,7 @@
   "dependencies": {},
   "devDependencies": {
     "coveralls": "^2.10.0",
-    "istanbul": "^0.3.5",
+    "istanbul": "^0.4.5",
     "lint-trap": "^1.0.0",
     "opn": "^1.0.1",
     "pre-commit": "0.0.11",