diff --git a/package.json b/package.json
index 5a91cc60..fd6fda59 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "elasticsearch-exceptions": "0.0.4",
     "express": "^4.8.8",
     "express-http-proxy": "^0.11.0",
-    "extend": "3.0.0",
+    "extend": "^3.0.1",
     "geojson": "^0.4.0",
     "geojson-extent": "^0.3.1",
     "geolib": "^2.0.18",