diff --git a/package.json b/package.json
index baf91fe..5ebed9d 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,6 @@
     "express": "~4.12.2",
     "less": "~2.4.0",
     "extend": "~2.0.0",
-    "when": "~3.7.2",
     "jsdom": "~4.0.4",
     "underscore": "~1.8.2",
     "uglify-js": "~2.4.17",