diff --git a/package.json b/package.json
index 7a472e7..7316e4b 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "lib"
   ],
   "dependencies": {
-    "lodash.assign": "3.2.0",
+    "lodash.assign": "4.0.1",
     "lodash.values": "3.0.0",
     "passerror": "1.1.1",
     "seq": "0.3.5"