diff --git a/package.json b/package.json
index 126c1c5..d2d7894 100644
--- a/package.json
+++ b/package.json
@@ -39,10 +39,10 @@
     "underscore": "~1.4.3",
     "mapnik-reference": "https://github.com/mapnik/mapnik-reference/archive/master.tar.gz",
     "xml2js": "~0.2.4",
-    "optimist": "~0.3.5"
+    "optimist": "~0.6.0"
   },
   "devDependencies": {
-    "mocha": "1.7.x",
+    "mocha": "1.12.x",
     "jshint": "0.2.x",
     "sax": "0.1.x"
   },