diff --git a/package.json b/package.json
index 8be70fbe..c6c4534b 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
     "reselect": "^2.0.0",
     "sax": "^0.6.1",
     "serve-favicon": "~2.2.0",
+    "underscore": "^1.8.3",
     "xmlbuilder": "^2.6.2",
     "xmlrpc": "^1.3.0"
   },