diff --git a/package.json b/package.json
index 16d6915..c261e0f 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "contributors": "*",
     "co": "*",
-    "should": "*",
+    "should": "8.1.0",
     "jshint": "*",
     "cov": "*",
     "istanbul": "git://github.com/gotwarlost/istanbul.git#harmony",