diff --git a/source/package.json b/source/package.json
index 8524bd0..0731ff5 100644
--- a/source/package.json
+++ b/source/package.json
@@ -40,7 +40,7 @@
     "priorityqueuejs": "1.0.0",
     "semaphore": "1.0.5",
     "tunnel": "0.0.5",
-    "underscore": "1.8.3"
+    "underscore": "1.12.1"
   },
   "repository": {
     "type": "git",