diff --git a/package.json b/package.json
index 6bdee757d..e7f34d5af 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "temp": "0.7.0",
     "text-buffer": "^3.8.2",
     "theorist": "^1.0.2",
-    "underscore-plus": "^1.6.5",
+    "underscore-plus": "^1.6.6",
     "vm-compatibility-layer": "0.1.0"
   },
   "packageDependencies": {