diff --git a/package.json b/package.json
index 27f8c857..aec6db01 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   ],
   "dependencies": {
     "async": "~0.2.6",
-    "source-map": "0.1.34",
+    "source-map": "~0.4.2",
     "uglify-to-browserify": "~1.0.0",
     "yargs": "~3.5.4"
   },