diff --git a/package.json b/package.json
index 716031d..2b8661d 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "mocha": "^5.0.5",
     "unexpected": "^10.37.2",
     "unexpected-express": "^10.0.0",
-    "unexpected-messy": "^7.4.1"
+    "unexpected-messy": "^9.0.0"
   },
   "peerDependencies": {
     "express": "^4.16.3"