diff --git a/package.json b/package.json
index 552d466..277df93 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "istanbul": "^0.3.0",
     "jshint": "=2.5.1",
     "mocha": "2.3.3",
-    "unexpected": "8.5.0",
+    "unexpected": "9.16.1",
     "urltools": "=0.1.0"
   },
   "directories": {