diff --git a/package.json b/package.json
index 56118be05..f6542e3a1 100644
--- a/package.json
+++ b/package.json
@@ -31,6 +31,6 @@
     "load-grunt-tasks": "~3.2.0",
     "time-grunt": "~1.2.1",
     "underscore": "~1.8.3",
-    "underscore.string": "~3.1.1"
+    "underscore.string": "~3.3.5"
   }
 }