diff --git a/package.json b/package.json
index 6114e33..f3addef 100644
--- a/package.json
+++ b/package.json
@@ -36,9 +36,9 @@
     "node": ">=0.4.x"
   },
   "dependencies": {
-    "underscore": "~1.4.3",
+    "underscore": "~1.6.0",
     "mapnik-reference": "https://github.com/mapnik/mapnik-reference/tarball/master",
-    "xml2js": "~0.2.4",
+    "xml2js": "~0.4.2",
     "optimist": "~0.6.0"
   },
   "devDependencies": {