diff --git a/node_modules/error-ex/package.json b/node_modules/error-ex/package.json
index 01f328d44e..739f61481c 100644
--- a/node_modules/error-ex/package.json
+++ b/node_modules/error-ex/package.json
@@ -35,10 +35,10 @@
   "devDependencies": {
     "coffee-script": "^1.9.3",
     "coveralls": "^2.11.2",
-    "istanbul": "^0.3.17",
+    "istanbul": "^0.4.5",
     "mocha": "^2.2.5",
     "should": "^7.0.1",
-    "xo": "^0.7.1"
+    "xo": "^0.42.0"
   },
   "dependencies": {
     "is-arrayish": "^0.2.1"