diff --git a/package.json b/package.json
index d3ff5b451..1604ced03 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "temp": "0.5.0",
     "text-buffer": "0.13.0",
     "theorist": "~0.14.0",
-    "underscore-plus": "0.6.1",
+    "underscore-plus": "1.x",
     "vm-compatibility-layer": "0.1.0"
   },
   "packageDependencies": {