diff --git a/package.json b/package.json
index e76a971..1aa93e5 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   },
   "dependencies": {
     "esprima": "~4.0.0",
-    "underscore": "~1.5.1",
+    "underscore": "~1.13.6",
     "react": "^0.11.1",
     "escodegen": "^1.3.3"
   },