diff --git a/package.json b/package.json
index f56b61f..e781add 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   "dependencies": {
     "source-map": "~0.1.31",
     "uglify-js": "~2.4.13",
-    "underscore": "1.4.4"
+    "underscore": "1.13.8"
   },
   "keywords": [
     "language",