diff --git a/package.json b/package.json
index 421d04e..4b790c4 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
   },
   "dependencies": {
     "esprima": "1.x",
-    "lodash": "2.x",
+    "lodash": "4.x",
     "estraverse": "1.x",
     "escodegen": "1.x",
     "sourcemap-to-ast": "0.0.2"