diff --git a/package.json b/package.json
index 13e3fef..9b0da59 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
   },
   "devDependencies": {
     "mocha": "^3.0.0",
-    "should": "^12.0.0",
+    "should": "^13.0.1",
     "standard": "^10.0.0"
   },
   "optionalDependencies": {},