diff --git a/package.json b/package.json
index 3c9e7a1..dce25db 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "jshint": "^2.9.1",
     "lodash.pluck": "3.1.2",
     "mocha": "^2.4.5",
-    "unexpected": "^10.8.1",
+    "unexpected": "^10.13.3",
     "urltools": "0.2.1"
   },
   "directories": {