diff --git a/package.json b/package.json
index 69ac619..068af5e 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,6 @@
     "license": "ISC",
     "devDependencies": {
         "mocha": "3.5.2",
-        "should": "12.0.0"
+        "should": "13.2.3"
     }
 }