diff --git a/package.json b/package.json
index c1f9213..5319b7b 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "clone": "^1.0.2",
     "debug": "~0.8.1",
     "deep-equal": "^1.0.0",
-    "extend": "^1.3.0",
+    "extend": "^3.0.2",
     "json-hash": "0.0.4",
     "keypather": "^1.8.1",
     "moment": "^2.14.1",