diff --git a/package.json b/package.json
index 2d11b9d..c4ce49d 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
        "lib": "lib"
    },
    "devDependencies": {
-       "vows": ">=0.5.2"
+       "vows": ">=0.5.2",
+       "sandboxed-module": ">= 0.1.1"
    } 
 }