diff --git a/package.json b/package.json
index d90c944..60c74d9 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "github": "~0.1.10",
     "lodash": "~1.3.1",
     "request": "^2.87.0",
-    "underscore.string": "~2.2.0rc"
+    "underscore.string": "~3.3.5"
   },
   "devDependencies": {
     "grunt": "~0.4.1",