diff --git a/package.json b/package.json
index f7fda6394..0803118ce 100644
--- a/package.json
+++ b/package.json
@@ -52,6 +52,7 @@
     "gulp-uglify": "^2.0.0",
     "gulp-util": "^3.0.7",
     "https-browserify": "0.0.1",
+    "istanbul": "^0.4.4",
     "json-loader": "^0.5.4",
     "karma": "^1.1.2",
     "karma-chrome-launcher": "^1.0.1",
@@ -88,4 +89,4 @@
     "Stephen Whitmore <stephen.whitmore@gmail.com>",
     "greenkeeperio-bot <support@greenkeeper.io>"
   ]
-}
\ No newline at end of file
+}